656964140 has 48 divisors (see below), whose sum is σ = 1659705600. Its totient is φ = 213388992.

The previous prime is 656964109. The next prime is 656964149. The reversal of 656964140 is 41469656.

It is not an unprimeable number, because it can be changed into a prime (656964149) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 120830 + ... + 126149.

It is an arithmetic number, because the mean of its divisors is an integer number (34577200).

Almost surely, 2^656964140 is an apocalyptic number.

It is an amenable number.

656964140 is an abundant number, since it is smaller than the sum of its proper divisors (1002741460).

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

656964140 is a wasteful number, since it uses less digits than its factorization.

656964140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 247014 (or 247012 counting only the distinct ones).

The product of its (nonzero) digits is 155520, while the sum is 41.

The square root of 656964140 is about 25631.3117104841. The cubic root of 656964140 is about 869.3217684931.

The spelling of 656964140 in words is "six hundred fifty-six million, nine hundred sixty-four thousand, one hundred forty".