28875904 has 32 divisors (see below), whose sum is σ = 57769740. Its totient is φ = 14376960.

The previous prime is 28875893. The next prime is 28875929. The reversal of 28875904 is 40957882.

It can be written as a sum of positive squares in 2 ways, for example, as 25806400 + 3069504 = 5080^2 + 1752^2 .

It is a tau number, because it is divible by the number of its divisors (32).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 55164 + ... + 55684.

Almost surely, 2^28875904 is an apocalyptic number.

It is an amenable number.

28875904 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

28875904 is an equidigital number, since it uses as much as digits as its factorization.

28875904 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 968 (or 956 counting only the distinct ones).

The product of its (nonzero) digits is 161280, while the sum is 43.

The square root of 28875904 is about 5373.6304301654. The cubic root of 28875904 is about 306.7928235407.

The spelling of 28875904 in words is "twenty-eight million, eight hundred seventy-five thousand, nine hundred four".