56807640 has 48 divisors (see below), whose sum is σ = 184626000. Its totient is φ = 15148608.

The previous prime is 56807627. The next prime is 56807711. The reversal of 56807640 is 4670865.

It is a happy number.

56807640 is a `hidden beast` number, since 5 + 6 + 8 + 0 + 7 + 640 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 56807595 and 56807604.

It is a congruent number.

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, 78540 + ... + 79259.

It is an arithmetic number, because the mean of its divisors is an integer number (3846375).

Almost surely, 2^56807640 is an apocalyptic number.

It is an amenable number.

56807640 is an abundant number, since it is smaller than the sum of its proper divisors (127818360).

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

56807640 is a wasteful number, since it uses less digits than its factorization.

56807640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 157816 (or 157809 counting only the distinct ones).

The product of its (nonzero) digits is 40320, while the sum is 36.

The square root of 56807640 is about 7537.0843168960. The cubic root of 56807640 is about 384.4167025941.

The spelling of 56807640 in words is "fifty-six million, eight hundred seven thousand, six hundred forty".