656748312 has 96 divisors (see below), whose sum is σ = 1818801600. Its totient is φ = 197461440.

The previous prime is 656748283. The next prime is 656748317. The reversal of 656748312 is 213847656.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (656748317) 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, 402843 + ... + 404469.

It is an arithmetic number, because the mean of its divisors is an integer number (18945850).

Almost surely, 2^656748312 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 656748312, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (909400800).

656748312 is an abundant number, since it is smaller than the sum of its proper divisors (1162053288).

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

656748312 is a wasteful number, since it uses less digits than its factorization.

656748312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1797 (or 1782 counting only the distinct ones).

The product of its digits is 241920, while the sum is 42.

The square root of 656748312 is about 25627.1011236152. The cubic root of 656748312 is about 869.2265605930.

The spelling of 656748312 in words is "six hundred fifty-six million, seven hundred forty-eight thousand, three hundred twelve".