56687724 has 36 divisors (see below), whose sum is σ = 151724664. Its totient is φ = 17784192.

The previous prime is 56687711. The next prime is 56687753. The reversal of 56687724 is 42778665.

56687724 is a `hidden beast` number, since 566 + 87 + 7 + 2 + 4 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a self number, because there is not a number n which added to its sum of digits gives 56687724.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 45702 + ... + 46925.

It is an arithmetic number, because the mean of its divisors is an integer number (4214574).

Almost surely, 2^56687724 is an apocalyptic number.

It is an amenable number.

56687724 is an abundant number, since it is smaller than the sum of its proper divisors (95036940).

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

56687724 is a wasteful number, since it uses less digits than its factorization.

56687724 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 92654 (or 92649 counting only the distinct ones).

The product of its digits is 564480, while the sum is 45.

The square root of 56687724 is about 7529.1250487689. The cubic root of 56687724 is about 384.1460219398.

The spelling of 56687724 in words is "fifty-six million, six hundred eighty-seven thousand, seven hundred twenty-four".