856669912 has 32 divisors (see below), whose sum is σ = 1836875520. Its totient is φ = 366913440.

The previous prime is 856669897. The next prime is 856669921. The reversal of 856669912 is 219966658.

It is a self number, because there is not a number n which added to its sum of digits gives 856669912.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 108813 + ... + 116419.

It is an arithmetic number, because the mean of its divisors is an integer number (57402360).

Almost surely, 2^856669912 is an apocalyptic number.

It is an amenable number.

856669912 is an abundant number, since it is smaller than the sum of its proper divisors (980205608).

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

856669912 is a wasteful number, since it uses less digits than its factorization.

856669912 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9631 (or 9627 counting only the distinct ones).

The product of its digits is 1399680, while the sum is 52.

The square root of 856669912 is about 29268.9239979880. The cubic root of 856669912 is about 949.7395082653.

The spelling of 856669912 in words is "eight hundred fifty-six million, six hundred sixty-nine thousand, nine hundred twelve".