56987728 has 40 divisors (see below), whose sum is σ = 129132608. Its totient is φ = 23853312.

The previous prime is 56987713. The next prime is 56987741. The reversal of 56987728 is 82778965.

It is a super-2 number, since 2×56987728² = 6495202285203968, which contains 22 as substring.

It is a congruent number.

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, 1101 + ... + 10732.

Almost surely, 2^56987728 is an apocalyptic number.

It is an amenable number.

56987728 is an abundant number, since it is smaller than the sum of its proper divisors (72144880).

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

56987728 is a wasteful number, since it uses less digits than its factorization.

56987728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11891 (or 11885 counting only the distinct ones).

The product of its digits is 1693440, while the sum is 52.

The square root of 56987728 is about 7549.0216584667. The cubic root of 56987728 is about 384.8224919606.

The spelling of 56987728 in words is "fifty-six million, nine hundred eighty-seven thousand, seven hundred twenty-eight".