56573739 has 24 divisors (see below), whose sum is σ = 87188400. Its totient is φ = 35225088.

The previous prime is 56573731. The next prime is 56573749. The reversal of 56573739 is 93737565.

56573739 is a `hidden beast` number, since 5 + 6 + 573 + 73 + 9 = 666.

It is not a de Polignac number, because 56573739 - 2³ = 56573731 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 56573694 and 56573703.

It is not an unprimeable number, because it can be changed into a prime (56573731) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 19612 + ... + 22310.

It is an arithmetic number, because the mean of its divisors is an integer number (3632850).

Almost surely, 2^56573739 is an apocalyptic number.

56573739 is a deficient number, since it is larger than the sum of its proper divisors (30614661).

56573739 is a wasteful number, since it uses less digits than its factorization.

56573739 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2859 (or 2856 counting only the distinct ones).

The product of its digits is 595350, while the sum is 45.

The square root of 56573739 is about 7521.5516351349. The cubic root of 56573739 is about 383.8883749442. Note that the first 3 decimals are identical.

The spelling of 56573739 in words is "fifty-six million, five hundred seventy-three thousand, seven hundred thirty-nine".