656840922 has 16 divisors (see below), whose sum is σ = 1318680000. Its totient is φ = 218113952.

The previous prime is 656840911. The next prime is 656840941. The reversal of 656840922 is 229048656.

656840922 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 206547 + ... + 209702.

It is an arithmetic number, because the mean of its divisors is an integer number (82417500).

Almost surely, 2^656840922 is an apocalyptic number.

656840922 is an abundant number, since it is smaller than the sum of its proper divisors (661839078).

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

656840922 is a wasteful number, since it uses less digits than its factorization.

656840922 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 416517.

The product of its (nonzero) digits is 207360, while the sum is 42.

The square root of 656840922 is about 25628.9079361568. The cubic root of 656840922 is about 869.2674160657.

The spelling of 656840922 in words is "six hundred fifty-six million, eight hundred forty thousand, nine hundred twenty-two".