856326864 has 40 divisors (see below), whose sum is σ = 2234995840. Its totient is φ = 282498048.

The previous prime is 856326851. The next prime is 856326901. The reversal of 856326864 is 468623658.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 87304 + ... + 96615.

It is an arithmetic number, because the mean of its divisors is an integer number (55874896).

Almost surely, 2^856326864 is an apocalyptic number.

It is an amenable number.

856326864 is an abundant number, since it is smaller than the sum of its proper divisors (1378668976).

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

856326864 is a wasteful number, since it uses less digits than its factorization.

856326864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 184027 (or 184021 counting only the distinct ones).

The product of its digits is 1658880, while the sum is 48.

The square root of 856326864 is about 29263.0631342654. The cubic root of 856326864 is about 949.6127189645.

The spelling of 856326864 in words is "eight hundred fifty-six million, three hundred twenty-six thousand, eight hundred sixty-four".