56931720 has 64 divisors (see below), whose sum is σ = 172091520. Its totient is φ = 15066624.

The previous prime is 56931713. The next prime is 56931731. The reversal of 56931720 is 2713965.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14709 + ... + 18171.

It is an arithmetic number, because the mean of its divisors is an integer number (2688930).

Almost surely, 2^56931720 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 56931720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (86045760).

56931720 is an abundant number, since it is smaller than the sum of its proper divisors (115159800).

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

56931720 is a wasteful number, since it uses less digits than its factorization.

56931720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3614 (or 3610 counting only the distinct ones).

The product of its (nonzero) digits is 11340, while the sum is 33.

The square root of 56931720 is about 7545.3111267860. The cubic root of 56931720 is about 384.6963817517.

The spelling of 56931720 in words is "fifty-six million, nine hundred thirty-one thousand, seven hundred twenty".