656020992 has 160 divisors (see below), whose sum is σ = 1955124864. Its totient is φ = 193740800.

The previous prime is 656020921. The next prime is 656020993. The reversal of 656020992 is 299020656.

It is a self number, because there is not a number n which added to its sum of digits gives 656020992.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (656020993) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 692263 + ... + 693209.

Almost surely, 2^656020992 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 656020992, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (977562432).

656020992 is an abundant number, since it is smaller than the sum of its proper divisors (1299103872).

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

656020992 is a wasteful number, since it uses less digits than its factorization.

656020992 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1020 (or 1004 counting only the distinct ones).

The product of its (nonzero) digits is 58320, while the sum is 39.

The square root of 656020992 is about 25612.9067464042. The cubic root of 656020992 is about 868.9055652820.

The spelling of 656020992 in words is "six hundred fifty-six million, twenty thousand, nine hundred ninety-two".