656393650 has 24 divisors (see below), whose sum is σ = 1331883504. Its totient is φ = 238688400.

The previous prime is 656393623. The next prime is 656393669. The reversal of 656393650 is 56393656.

It is a junction number, because it is equal to n+sod(n) for n = 656393597 and 656393606.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 596172 + ... + 597271.

It is an arithmetic number, because the mean of its divisors is an integer number (55495146).

Almost surely, 2^656393650 is an apocalyptic number.

656393650 is an abundant number, since it is smaller than the sum of its proper divisors (675489854).

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

656393650 is a wasteful number, since it uses less digits than its factorization.

656393650 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1193466 (or 1193461 counting only the distinct ones).

The product of its (nonzero) digits is 437400, while the sum is 43.

The square root of 656393650 is about 25620.1805223929. The cubic root of 656393650 is about 869.0700637357.

The spelling of 656393650 in words is "six hundred fifty-six million, three hundred ninety-three thousand, six hundred fifty".