28580928 has 28 divisors (see below), whose sum is σ = 75620880. Its totient is φ = 9526912.

The previous prime is 28580917. The next prime is 28580933. The reversal of 28580928 is 82908582.

It is a self number, because there is not a number n which added to its sum of digits gives 28580928.

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, 74238 + ... + 74621.

Almost surely, 2^28580928 is an apocalyptic number.

It is an amenable number.

28580928 is an abundant number, since it is smaller than the sum of its proper divisors (47039952).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28580928 is a wasteful number, since it uses less digits than its factorization.

28580928 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 148874 (or 148864 counting only the distinct ones).

The product of its (nonzero) digits is 92160, while the sum is 42.

The square root of 28580928 is about 5346.1133545783. The cubic root of 28580928 is about 305.7445858775.

The spelling of 28580928 in words is "twenty-eight million, five hundred eighty thousand, nine hundred twenty-eight".