656344086 has 12 divisors (see below), whose sum is σ = 1312813692. Its totient is φ = 218760444.

The previous prime is 656344069. The next prime is 656344111. The reversal of 656344086 is 680443656.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

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 5 ways as a sum of consecutive naturals, for example, 57525 + ... + 67983.

It is an arithmetic number, because the mean of its divisors is an integer number (109401141).

Almost surely, 2^656344086 is an apocalyptic number.

656344086 is an abundant number, since it is smaller than the sum of its proper divisors (656469606).

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

656344086 is an frugal number, since it uses more digits than its factorization.

656344086 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20923 (or 10464 counting only the distinct ones).

The product of its (nonzero) digits is 414720, while the sum is 42.

The square root of 656344086 is about 25619.2132197693. The cubic root of 656344086 is about 869.0481888171.

The spelling of 656344086 in words is "six hundred fifty-six million, three hundred forty-four thousand, eighty-six".