656473400 has 72 divisors (see below), whose sum is σ = 1677731160. Its totient is φ = 238708800.

The previous prime is 656473397. The next prime is 656473459. The reversal of 656473400 is 4374656.

656473400 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 an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 10637 + ... + 37763.

Almost surely, 2^656473400 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 656473400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (838865580).

656473400 is an abundant number, since it is smaller than the sum of its proper divisors (1021257760).

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

656473400 is a wasteful number, since it uses less digits than its factorization.

656473400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27165 (or 27145 counting only the distinct ones).

The product of its (nonzero) digits is 60480, while the sum is 35.

The square root of 656473400 is about 25621.7368654040. The cubic root of 656473400 is about 869.1052588410.

The spelling of 656473400 in words is "six hundred fifty-six million, four hundred seventy-three thousand, four hundred".