56640180 has 24 divisors (see below), whose sum is σ = 158592672. Its totient is φ = 15104032.

The previous prime is 56640163. The next prime is 56640187. The reversal of 56640180 is 8104665.

It is a hoax number, since the sum of its digits (30) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56640187) 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, 471942 + ... + 472061.

It is an arithmetic number, because the mean of its divisors is an integer number (6608028).

Almost surely, 2^56640180 is an apocalyptic number.

It is an amenable number.

56640180 is an abundant number, since it is smaller than the sum of its proper divisors (101952492).

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

56640180 is a wasteful number, since it uses less digits than its factorization.

56640180 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 944015 (or 944013 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 30.

The square root of 56640180 is about 7525.9670474963. The cubic root of 56640180 is about 384.0385974658.

The spelling of 56640180 in words is "fifty-six million, six hundred forty thousand, one hundred eighty".