656394772 has 24 divisors (see below), whose sum is σ = 1254026592. Its totient is φ = 298144800.

The previous prime is 656394727. The next prime is 656394773. The reversal of 656394772 is 277493656.

656394772 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (656394773) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 66723 + ... + 75925.

It is an arithmetic number, because the mean of its divisors is an integer number (52251108).

Almost surely, 2^656394772 is an apocalyptic number.

It is an amenable number.

656394772 is a deficient number, since it is larger than the sum of its proper divisors (597631820).

656394772 is a wasteful number, since it uses less digits than its factorization.

656394772 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10839 (or 10837 counting only the distinct ones).

The product of its digits is 1905120, while the sum is 49.

The square root of 656394772 is about 25620.2024191847. The cubic root of 656394772 is about 869.0705589142.

The spelling of 656394772 in words is "six hundred fifty-six million, three hundred ninety-four thousand, seven hundred seventy-two".