656230872 has 128 divisors (see below), whose sum is σ = 1921916160. Its totient is φ = 184504320.

The previous prime is 656230849. The next prime is 656230901. The reversal of 656230872 is 278032656.

656230872 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 656230872.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 326623 + ... + 328625.

It is an arithmetic number, because the mean of its divisors is an integer number (15014970).

Almost surely, 2^656230872 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 656230872, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (960958080).

656230872 is an abundant number, since it is smaller than the sum of its proper divisors (1265685288).

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

656230872 is a wasteful number, since it uses less digits than its factorization.

656230872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2113 (or 2109 counting only the distinct ones).

The product of its (nonzero) digits is 120960, while the sum is 39.

The square root of 656230872 is about 25617.0035718466. The cubic root of 656230872 is about 868.9982180364.

The spelling of 656230872 in words is "six hundred fifty-six million, two hundred thirty thousand, eight hundred seventy-two".