56732840 has 32 divisors (see below), whose sum is σ = 131102280. Its totient is φ = 22079232.

The previous prime is 56732839. The next prime is 56732849. The reversal of 56732840 is 4823765.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 55562116 + 1170724 = 7454^2 + 1082^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 56732840.

It is not an unprimeable number, because it can be changed into a prime (56732849) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17687 + ... + 20646.

Almost surely, 2^56732840 is an apocalyptic number.

It is an amenable number.

56732840 is an abundant number, since it is smaller than the sum of its proper divisors (74369440).

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

56732840 is a wasteful number, since it uses less digits than its factorization.

56732840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38381 (or 38377 counting only the distinct ones).

The product of its (nonzero) digits is 40320, while the sum is 35.

The square root of 56732840 is about 7532.1205513454. The cubic root of 56732840 is about 384.2479048812.

The spelling of 56732840 in words is "fifty-six million, seven hundred thirty-two thousand, eight hundred forty".