56438728 has 32 divisors (see below), whose sum is σ = 108633600. Its totient is φ = 27476352.

The previous prime is 56438719. The next prime is 56438761. The reversal of 56438728 is 82783465.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 137788 + ... + 138196.

It is an arithmetic number, because the mean of its divisors is an integer number (3394800).

Almost surely, 2^56438728 is an apocalyptic number.

It is an amenable number.

56438728 is a deficient number, since it is larger than the sum of its proper divisors (52194872).

56438728 is a wasteful number, since it uses less digits than its factorization.

56438728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 829 (or 825 counting only the distinct ones).

The product of its digits is 322560, while the sum is 43.

The square root of 56438728 is about 7512.5713307762. The cubic root of 56438728 is about 383.5827535347.

The spelling of 56438728 in words is "fifty-six million, four hundred thirty-eight thousand, seven hundred twenty-eight".