56855720 has 32 divisors (see below), whose sum is σ = 128648520. Its totient is φ = 22613760.

The previous prime is 56855707. The next prime is 56855723. The reversal of 56855720 is 2755865.

It can be written as a sum of positive squares in 4 ways, for example, as 10588516 + 46267204 = 3254^2 + 6802^2 .

It is not an unprimeable number, because it can be changed into a prime (56855723) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3314 + ... + 11166.

Almost surely, 2^56855720 is an apocalyptic number.

It is an amenable number.

56855720 is an abundant number, since it is smaller than the sum of its proper divisors (71792800).

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

56855720 is a wasteful number, since it uses less digits than its factorization.

56855720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8045 (or 8041 counting only the distinct ones).

The product of its (nonzero) digits is 84000, while the sum is 38.

The square root of 56855720 is about 7540.2732045994. The cubic root of 56855720 is about 384.5251242966.

It can be divided in two parts, 56855 and 720, that added together give a palindrome (57575).

The spelling of 56855720 in words is "fifty-six million, eight hundred fifty-five thousand, seven hundred twenty".