56720424 has 32 divisors (see below), whose sum is σ = 142089120. Its totient is φ = 18868416.

The previous prime is 56720407. The next prime is 56720431. The reversal of 56720424 is 42402765.

It is a junction number, because it is equal to n+sod(n) for n = 56720391 and 56720400.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11247 + ... + 15489.

It is an arithmetic number, because the mean of its divisors is an integer number (4440285).

Almost surely, 2^56720424 is an apocalyptic number.

It is an amenable number.

56720424 is an abundant number, since it is smaller than the sum of its proper divisors (85368696).

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

56720424 is a wasteful number, since it uses less digits than its factorization.

56720424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4809 (or 4805 counting only the distinct ones).

The product of its (nonzero) digits is 13440, while the sum is 30.

The square root of 56720424 is about 7531.2963027622. The cubic root of 56720424 is about 384.2198719109.

The spelling of 56720424 in words is "fifty-six million, seven hundred twenty thousand, four hundred twenty-four".