56720783 has 12 divisors (see below), whose sum is σ = 68851440. Its totient is φ = 46503072.

The previous prime is 56720779. The next prime is 56720813. The reversal of 56720783 is 38702765.

It is a happy number.

It is not a de Polignac number, because 56720783 - 2² = 56720779 is a prime.

It is a Smith number, since the sum of its digits (38) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56720743) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 24038 + ... + 26291.

It is an arithmetic number, because the mean of its divisors is an integer number (5737620).

Almost surely, 2^56720783 is an apocalyptic number.

56720783 is a deficient number, since it is larger than the sum of its proper divisors (12130657).

56720783 is a wasteful number, since it uses less digits than its factorization.

56720783 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50366 (or 50359 counting only the distinct ones).

The product of its (nonzero) digits is 70560, while the sum is 38.

The square root of 56720783 is about 7531.3201366029. The cubic root of 56720783 is about 384.2206825222.

The spelling of 56720783 in words is "fifty-six million, seven hundred twenty thousand, seven hundred eighty-three".