56745680 has 20 divisors (see below), whose sum is σ = 131933892. Its totient is φ = 22698240.

The previous prime is 56745673. The next prime is 56745683. The reversal of 56745680 is 8654765.

It can be written as a sum of positive squares in 2 ways, for example, as 41938576 + 14807104 = 6476^2 + 3848^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56745683) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 354581 + ... + 354740.

Almost surely, 2^56745680 is an apocalyptic number.

It is an amenable number.

56745680 is an abundant number, since it is smaller than the sum of its proper divisors (75188212).

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

56745680 is a wasteful number, since it uses less digits than its factorization.

56745680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 709334 (or 709328 counting only the distinct ones).

The product of its (nonzero) digits is 201600, while the sum is 41.

The square root of 56745680 is about 7532.9728527322. The cubic root of 56745680 is about 384.2768908615.

The spelling of 56745680 in words is "fifty-six million, seven hundred forty-five thousand, six hundred eighty".