56731880 has 16 divisors (see below), whose sum is σ = 127646820. Its totient is φ = 22692736.

The previous prime is 56731849. The next prime is 56731897. The reversal of 56731880 is 8813765.

It can be written as a sum of positive squares in 2 ways, for example, as 56640676 + 91204 = 7526^2 + 302^2 .

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, 709109 + ... + 709188.

Almost surely, 2^56731880 is an apocalyptic number.

It is an amenable number.

56731880 is an abundant number, since it is smaller than the sum of its proper divisors (70914940).

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

56731880 is a wasteful number, since it uses less digits than its factorization.

56731880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1418308 (or 1418304 counting only the distinct ones).

The product of its (nonzero) digits is 40320, while the sum is 38.

The square root of 56731880 is about 7532.0568240023. The cubic root of 56731880 is about 384.2457375294.

The spelling of 56731880 in words is "fifty-six million, seven hundred thirty-one thousand, eight hundred eighty".