656274432 has 88 divisors (see below), whose sum is σ = 1908328032. Its totient is φ = 198860800.

The previous prime is 656274427. The next prime is 656274449. The reversal of 656274432 is 234472656.

It is a tau number, because it is divible by the number of its divisors (88).

It is a super-2 number, since 2×656274432² = 861392260193845248, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24082 + ... + 43502.

Almost surely, 2^656274432 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 656274432, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (954164016).

656274432 is an abundant number, since it is smaller than the sum of its proper divisors (1252053600).

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

656274432 is a wasteful number, since it uses less digits than its factorization.

656274432 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19455 (or 19437 counting only the distinct ones).

The product of its digits is 241920, while the sum is 39.

The square root of 656274432 is about 25617.8537742723. The cubic root of 656274432 is about 869.0174453777.

The spelling of 656274432 in words is "six hundred fifty-six million, two hundred seventy-four thousand, four hundred thirty-two".