656572220 has 48 divisors (see below), whose sum is σ = 1409092608. Its totient is φ = 256919040.

The previous prime is 656572193. The next prime is 656572229. The reversal of 656572220 is 22275656.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (656572229) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 183650 + ... + 187190.

It is an arithmetic number, because the mean of its divisors is an integer number (29356096).

Almost surely, 2^656572220 is an apocalyptic number.

It is an amenable number.

656572220 is an abundant number, since it is smaller than the sum of its proper divisors (752520388).

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

656572220 is a wasteful number, since it uses less digits than its factorization.

656572220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3750 (or 3748 counting only the distinct ones).

The product of its (nonzero) digits is 50400, while the sum is 35.

The square root of 656572220 is about 25623.6652335297. The cubic root of 656572220 is about 869.1488659252.

The spelling of 656572220 in words is "six hundred fifty-six million, five hundred seventy-two thousand, two hundred twenty".