28608915 has 16 divisors (see below), whose sum is σ = 45844128. Its totient is φ = 15234816.

The previous prime is 28608883. The next prime is 28608917. The reversal of 28608915 is 51980682.

It is not a de Polignac number, because 28608915 - 2⁵ = 28608883 is a prime.

It is a super-3 number, since 3×28608915³ (a number of 23 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (28608917) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13999 + ... + 15911.

It is an arithmetic number, because the mean of its divisors is an integer number (2865258).

Almost surely, 2^28608915 is an apocalyptic number.

28608915 is a deficient number, since it is larger than the sum of its proper divisors (17235213).

28608915 is a wasteful number, since it uses less digits than its factorization.

28608915 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2918.

The product of its (nonzero) digits is 34560, while the sum is 39.

The square root of 28608915 is about 5348.7302231464. The cubic root of 28608915 is about 305.8443503337.

The spelling of 28608915 in words is "twenty-eight million, six hundred eight thousand, nine hundred fifteen".