856682964 has 18 divisors (see below), whose sum is σ = 2165504250. Its totient is φ = 285560976.

The previous prime is 856682927. The next prime is 856682977. The reversal of 856682964 is 469286658.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 725763600 + 130919364 = 26940^2 + 11442^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a self number, because there is not a number n which added to its sum of digits gives 856682964.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 11898339 + ... + 11898410.

Almost surely, 2^856682964 is an apocalyptic number.

It is an amenable number.

856682964 is an abundant number, since it is smaller than the sum of its proper divisors (1308821286).

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

856682964 is a wasteful number, since it uses less digits than its factorization.

856682964 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23796759 (or 23796754 counting only the distinct ones).

The product of its digits is 4976640, while the sum is 54.

The square root of 856682964 is about 29269.1469639961. The cubic root of 856682964 is about 949.7443315688.

The spelling of 856682964 in words is "eight hundred fifty-six million, six hundred eighty-two thousand, nine hundred sixty-four".