56747664 has 120 divisors (see below), whose sum is σ = 167132160. Its totient is φ = 17950464.

The previous prime is 56747657. The next prime is 56747687. The reversal of 56747664 is 46674765.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 446769 + ... + 446895.

It is an arithmetic number, because the mean of its divisors is an integer number (1392768).

Almost surely, 2^56747664 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 56747664, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (83566080).

56747664 is an abundant number, since it is smaller than the sum of its proper divisors (110384496).

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

56747664 is a wasteful number, since it uses less digits than its factorization.

56747664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 277 (or 268 counting only the distinct ones).

The product of its digits is 846720, while the sum is 45.

The square root of 56747664 is about 7533.1045392985. The cubic root of 56747664 is about 384.2813693020.

The spelling of 56747664 in words is "fifty-six million, seven hundred forty-seven thousand, six hundred sixty-four".