56920644 has 60 divisors (see below), whose sum is σ = 162339408. Its totient is φ = 17247600.

The previous prime is 56920631. The next prime is 56920687. The reversal of 56920644 is 44602965.

56920644 is a `hidden beast` number, since 5 + 6 + 9 + 2 + 0 + 644 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 56920599 and 56920608.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 4422 + ... + 11549.

Almost surely, 2^56920644 is an apocalyptic number.

56920644 is a gapful number since it is divisible by the number (54) formed by its first and last digit.

It is an amenable number.

56920644 is an abundant number, since it is smaller than the sum of its proper divisors (105418764).

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

56920644 is a wasteful number, since it uses less digits than its factorization.

56920644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15998 (or 15987 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 36.

The square root of 56920644 is about 7544.5771253265. The cubic root of 56920644 is about 384.6714327222.

The spelling of 56920644 in words is "fifty-six million, nine hundred twenty thousand, six hundred forty-four".