656408312 has 96 divisors (see below), whose sum is σ = 1475374320. Its totient is φ = 272885760.

The previous prime is 656408281. The next prime is 656408317. The reversal of 656408312 is 213804656.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (656408317) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2319323 + ... + 2319605.

Almost surely, 2^656408312 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 656408312, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (737687160).

656408312 is an abundant number, since it is smaller than the sum of its proper divisors (818966008).

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

656408312 is a wasteful number, since it uses less digits than its factorization.

656408312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 461 (or 450 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 35.

The square root of 656408312 is about 25620.4666624166. The cubic root of 656408312 is about 869.0765345531.

The spelling of 656408312 in words is "six hundred fifty-six million, four hundred eight thousand, three hundred twelve".