656045472 has 96 divisors (see below), whose sum is σ = 1750339584. Its totient is φ = 215136000.

The previous prime is 656045443. The next prime is 656045531. The reversal of 656045472 is 274540656.

It is a tau number, because it is divible by the number of its divisors (96).

It is a super-2 number, since 2×656045472² = 860791322663405568, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 656045472.

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, 2420697 + ... + 2420967.

It is an arithmetic number, because the mean of its divisors is an integer number (18232704).

Almost surely, 2^656045472 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 656045472, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (875169792).

656045472 is an abundant number, since it is smaller than the sum of its proper divisors (1094294112).

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

656045472 is a wasteful number, since it uses less digits than its factorization.

656045472 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 602 (or 594 counting only the distinct ones).

The product of its (nonzero) digits is 201600, while the sum is 39.

The square root of 656045472 is about 25613.3846260115. The cubic root of 656045472 is about 868.9163731393.

The spelling of 656045472 in words is "six hundred fifty-six million, forty-five thousand, four hundred seventy-two".