856288656 has 60 divisors (see below), whose sum is σ = 2522554320. Its totient is φ = 270406080.

The previous prime is 856288619. The next prime is 856288687. The reversal of 856288656 is 656882658.

856288656 is a `hidden beast` number, since 8 + 5 + 628 + 8 + 6 + 5 + 6 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 153750 + ... + 159221.

It is an arithmetic number, because the mean of its divisors is an integer number (42042572).

Almost surely, 2^856288656 is an apocalyptic number.

It is an amenable number.

856288656 is an abundant number, since it is smaller than the sum of its proper divisors (1666265664).

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

856288656 is a wasteful number, since it uses less digits than its factorization.

856288656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 313004 (or 312995 counting only the distinct ones).

The product of its digits is 5529600, while the sum is 54.

The square root of 856288656 is about 29262.4102903366. The cubic root of 856288656 is about 949.5985953302.

The spelling of 856288656 in words is "eight hundred fifty-six million, two hundred eighty-eight thousand, six hundred fifty-six".