56720686 has 12 divisors (see below), whose sum is σ = 93519216. Its totient is φ = 25782020.

The previous prime is 56720683. The next prime is 56720701. The reversal of 56720686 is 68602765.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56720683) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 116950 + ... + 117433.

It is an arithmetic number, because the mean of its divisors is an integer number (7793268).

Almost surely, 2^56720686 is an apocalyptic number.

56720686 is a deficient number, since it is larger than the sum of its proper divisors (36798530).

56720686 is a wasteful number, since it uses less digits than its factorization.

56720686 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 234407 (or 234396 counting only the distinct ones).

The product of its (nonzero) digits is 120960, while the sum is 40.

The square root of 56720686 is about 7531.3136968261. The cubic root of 56720686 is about 384.2204634994.

The spelling of 56720686 in words is "fifty-six million, seven hundred twenty thousand, six hundred eighty-six".