656578032 has 80 divisors (see below), whose sum is σ = 1868475648. Its totient is φ = 197015040.

The previous prime is 656577991. The next prime is 656578081. The reversal of 656578032 is 230875656.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 48348 + ... + 60420.

Almost surely, 2^656578032 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 656578032, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (934237824).

656578032 is an abundant number, since it is smaller than the sum of its proper divisors (1211897616).

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

656578032 is a wasteful number, since it uses less digits than its factorization.

656578032 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12198 (or 12192 counting only the distinct ones).

The product of its (nonzero) digits is 302400, while the sum is 42.

The square root of 656578032 is about 25623.7786440642. The cubic root of 656578032 is about 869.1514304962.

The spelling of 656578032 in words is "six hundred fifty-six million, five hundred seventy-eight thousand, thirty-two".