656440896 has 28 divisors (see below), whose sum is σ = 1736833712. Its totient is φ = 218813568.

The previous prime is 656440891. The next prime is 656440901. The reversal of 656440896 is 698044656.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (656440891) and next prime (656440901).

It is a Harshad number since it is a multiple of its sum of digits (48).

It is not an unprimeable number, because it can be changed into a prime (656440891) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1709290 + ... + 1709673.

Almost surely, 2^656440896 is an apocalyptic number.

It is an amenable number.

656440896 is an abundant number, since it is smaller than the sum of its proper divisors (1080392816).

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

656440896 is a wasteful number, since it uses less digits than its factorization.

656440896 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3418978 (or 3418968 counting only the distinct ones).

The product of its (nonzero) digits is 1244160, while the sum is 48.

The square root of 656440896 is about 25621.1025523883. The cubic root of 656440896 is about 869.0909145870.

The spelling of 656440896 in words is "six hundred fifty-six million, four hundred forty thousand, eight hundred ninety-six".