856323312 has 80 divisors (see below), whose sum is σ = 2507756160. Its totient is φ = 249613056.

The previous prime is 856323257. The next prime is 856323317. The reversal of 856323312 is 213323658.

It is a super-2 number, since 2×856323312² = 1466579229349298688, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (856323317) 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, 24258 + ... + 47969.

It is an arithmetic number, because the mean of its divisors is an integer number (31346952).

Almost surely, 2^856323312 is an apocalyptic number.

It is an amenable number.

856323312 is an abundant number, since it is smaller than the sum of its proper divisors (1651432848).

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

856323312 is a wasteful number, since it uses less digits than its factorization.

856323312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72270 (or 72264 counting only the distinct ones).

The product of its digits is 25920, while the sum is 33.

The square root of 856323312 is about 29263.0024433584. The cubic root of 856323312 is about 949.6114059810.

The spelling of 856323312 in words is "eight hundred fifty-six million, three hundred twenty-three thousand, three hundred twelve".