30915 (number)
30,915 (thirty thousand nine hundred fifteen) is an odd fivedigits composite number following 30914 and preceding 30916. In scientific notation, it is written as 3.0915 × 10^{4}. The sum of its digits is 18. It has a total of 5 prime factors and 16 positive divisors. There are 16,416 positive integers (up to 30915) that are relatively prime to 30915.
Basic properties
 Is Prime? No
 Number parity Odd
 Number length 5
 Sum of Digits 18
 Digital Root 9
Name
Short name  30 thousand 915 

Full name  thirty thousand nine hundred fifteen 
Notation
Scientific notation  3.0915 × 10^{4} 

Engineering notation  30.915 × 10^{3} 
Prime Factorization of 30915
Prime Factorization 3^{3} × 5 × 229
Composite numberω(n)  Distinct Factors  3  Total number of distinct prime factors 

Ω(n)  Total Factors  5  Total number of prime factors 
rad(n)  Radical  3435  Product of the distinct prime numbers 
λ(n)  Liouville Lambda  1  Returns the parity of Ω(n), such that λ(n) = (1)^{Ω(n)} 
μ(n)  Mobius Mu  0  Returns:

Λ(n)  Mangoldt function  0  Returns log(p) if n is a power p^{k} of any prime p (for any k >= 1), else returns 0 
The prime factorization of 30,915 is 3^{3} × 5 × 229. Since it has a total of 5 prime factors, 30,915 is a composite number.
Divisors of 30915
16 divisors
τ(n)  Total Divisors  16  Total number of the positive divisors of n 

σ(n)  Sum of Divisors  55200  Sum of all the positive divisors of n 
s(n)  Aliquot Sum  24285  Sum of the proper positive divisors of n 
A(n)  Arithmetic Mean  3450  Returns the sum of divisors (σ(n)) divided by the total number of divisors (τ(n)) 
G(n)  Geometric Mean  175.82661914511  Returns the nth root of the product of n divisors 
H(n)  Harmonic Mean  8.9608695652174  Returns the total number of divisors (τ(n)) divided by the sum of the reciprocal of each divisors 
The number 30,915 can be divided by 16 positive divisors (out of which 0 are even, and 16 are odd). The sum of these divisors (counting 30,915) is 55,200, the average is 3,450.
Other Arithmetic Functions (n = 30915)
φ(n)  Euler Totient  16416  Total number of positive integers not greater than n that are coprime to n 

λ(n)  Carmichael Lambda  684  Smallest positive number such that a^{λ(n)} ≡ 1 (mod n) for all a coprime to n 
π(n)  Prime Pi  ≈ 3337  Total number of primes less than or equal to n 
r_{2}(n)  Sum of 2 squares  0  The number of ways n can be represented as the sum of 2 squares 
There are 16,416 positive integers (less than 30,915) that are coprime with 30,915. And there are approximately 3,337 prime numbers less than or equal to 30,915.
Divisibility of 30915
m  2  3  4  5  6  7  8  9 

n mod m  1  0  3  0  3  3  3  0 
The number 30,915 is divisible by 3, 5 and 9.
Classification of 30915
By Arithmetic functions
 Arithmetic
 Deficient
Expressible via specific sums
 Polite
Base conversion (30915)
Base  System  Value 

2  Binary  111100011000011 
3  Ternary  1120102000 
4  Quaternary  13203003 
5  Quinary  1442130 
6  Senary  355043 
8  Octal  74303 
10  Decimal  30915 
12  Duodecimal  15a83 
16  Hexadecimal  78c3 
20  Vigesimal  3h5f 
36  Base36  nur 
Basic calculations (n = 30915)
Multiplication
n×yn×2  61830 

n×3  92745 
n×4  123660 
n×5  154575 
Division
n÷yn÷2  15457.500 

n÷3  10305.000 
n÷4  7728.750 
n÷5  6183.000 
Exponentiation
n^{y}n^{2}  955737225 

n^{3}  29546616310875 
n^{4}  913433643250700625 
n^{5}  28238801081095409821875 
Nth Root
^{y}√n^{2}√n  175.82661914511 

^{3}√n  31.385068698536 
^{4}√n  13.25996301447 
^{5}√n  7.9074025817884 
30915 as geometric shapes
Circle
Radius = nDiameter  61830 

Circumference  194244.67377146 
Area  3002537044.8223 
Sphere
Radius = nVolume  1.2376457698758E+14 

Surface area  12010148179.289 
Circumference  194244.67377146 
Square
Length = nPerimeter  123660 

Area  955737225 
Diagonal  43720.412280764 
Cube
Length = nSurface area  5734423350 

Volume  29546616310875 
Space diagonal  53546.350715992 
Equilateral Triangle
Length = nPerimeter  92745 

Area  413846358.09622 
Altitude  26773.175357996 
Triangular Pyramid
Length = nSurface area  1655385432.3849 

Volume  3482102125756.1 
Height  25241.991799381 
Cryptographic Hash Functions
md5  0f139e33503a1930edf770e801372880 

sha1  c57f74993a5580c52a147b55b250d7fa8821ab02 
sha256  a66b630c4e8549bbfda89fb50e7c939e5a99db47c87578568555002eb454d0d3 
sha512  8ec2077e041b6d8660e823a2d577bf48274ec41ae28de17e9522f2eb5b8ee03813d8d41f0d93c38335cf8482653236a98987307ccdd6f9e2244b1a2887623c4b 
ripemd160  1eb09646677f65968332c2e781899eb2266e8b0c 