656449344 has 42 divisors (see below), whose sum is σ = 1881595170. Its totient is φ = 218816256.

The previous prime is 656449333. The next prime is 656449351. The reversal of 656449344 is 443944656.

656449344 is a `hidden beast` number, since 6 + 564 + 49 + 3 + 44 = 666.

It can be written as a sum of positive squares in only one way, i.e., 519840000 + 136609344 = 22800^2 + 11688^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 656449344.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 569259 + ... + 570410.

It is an arithmetic number, because the mean of its divisors is an integer number (44799885).

Almost surely, 2^656449344 is an apocalyptic number.

656449344 is a gapful number since it is divisible by the number (64) formed by its first and last digit.

It is an amenable number.

656449344 is an abundant number, since it is smaller than the sum of its proper divisors (1225145826).

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

656449344 is a wasteful number, since it uses less digits than its factorization.

656449344 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1139687 (or 1139674 counting only the distinct ones).

The product of its digits is 1244160, while the sum is 45.

The square root of 656449344 is about 25621.2674159574. The cubic root of 656449344 is about 869.0946427970.

The spelling of 656449344 in words is "six hundred fifty-six million, four hundred forty-nine thousand, three hundred forty-four".