28928432 has 20 divisors (see below), whose sum is σ = 60360720. Its totient is φ = 13351488.

The previous prime is 28928423. The next prime is 28928443. The reversal of 28928432 is 23482982.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 69332 + ... + 69747.

It is an arithmetic number, because the mean of its divisors is an integer number (3018036).

Almost surely, 2^28928432 is an apocalyptic number.

It is an amenable number.

28928432 is an abundant number, since it is smaller than the sum of its proper divisors (31432288).

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

28928432 is a wasteful number, since it uses less digits than its factorization.

28928432 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 139100 (or 139094 counting only the distinct ones).

The product of its digits is 55296, while the sum is 38.

The square root of 28928432 is about 5378.5157803989. The cubic root of 28928432 is about 306.9787392393.

The spelling of 28928432 in words is "twenty-eight million, nine hundred twenty-eight thousand, four hundred thirty-two".