56731636 has 24 divisors (see below), whose sum is σ = 107613800. Its totient is φ = 26013312.

The previous prime is 56731621. The next prime is 56731651. The reversal of 56731636 is 63613765.

It is an interprime number because it is at equal distance from previous prime (56731621) and next prime (56731651).

It can be written as a sum of positive squares in 4 ways, for example, as 5035536 + 51696100 = 2244^2 + 7190^2 .

It is a junction number, because it is equal to n+sod(n) for n = 56731595 and 56731604.

It is a congruent number.

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, 4690 + ... + 11638.

Almost surely, 2^56731636 is an apocalyptic number.

It is an amenable number.

56731636 is a deficient number, since it is larger than the sum of its proper divisors (50882164).

56731636 is a wasteful number, since it uses less digits than its factorization.

56731636 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7123 (or 7121 counting only the distinct ones).

The product of its digits is 68040, while the sum is 37.

The square root of 56731636 is about 7532.0406265500. The cubic root of 56731636 is about 384.2451866569.

The spelling of 56731636 in words is "fifty-six million, seven hundred thirty-one thousand, six hundred thirty-six".