656642252 has 12 divisors (see below), whose sum is σ = 1313284560. Its totient is φ = 281418096.

The previous prime is 656642251. The next prime is 656642257. The reversal of 656642252 is 252246656.

656642252 is an admirable number.

It is a super-2 number, since 2×656642252² = 862358094223263008, which contains 22 as substring.

It is a hoax number, since the sum of its digits (38) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (656642251) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11725727 + ... + 11725782.

It is an arithmetic number, because the mean of its divisors is an integer number (109440380).

Almost surely, 2^656642252 is an apocalyptic number.

It is an amenable number.

656642252 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

656642252 is a wasteful number, since it uses less digits than its factorization.

656642252 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23451520 (or 23451518 counting only the distinct ones).

The product of its digits is 172800, while the sum is 38.

The square root of 656642252 is about 25625.0317463218. The cubic root of 656642252 is about 869.1797668515.

The spelling of 656642252 in words is "six hundred fifty-six million, six hundred forty-two thousand, two hundred fifty-two".