856897968 has 40 divisors (see below), whose sum is σ = 2214702000. Its totient is φ = 285497344.

The previous prime is 856897961. The next prime is 856897973. The reversal of 856897968 is 869798658.

It is a junction number, because it is equal to n+sod(n) for n = 856897899 and 856897908.

It is not an unprimeable number, because it can be changed into a prime (856897961) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 192148 + ... + 196556.

It is an arithmetic number, because the mean of its divisors is an integer number (55367550).

Almost surely, 2^856897968 is an apocalyptic number.

It is an amenable number.

856897968 is an abundant number, since it is smaller than the sum of its proper divisors (1357804032).

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

856897968 is a wasteful number, since it uses less digits than its factorization.

856897968 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8469 (or 8463 counting only the distinct ones).

The product of its digits is 52254720, while the sum is 66.

The square root of 856897968 is about 29272.8196113733. The cubic root of 856897968 is about 949.8237782091.

The spelling of 856897968 in words is "eight hundred fifty-six million, eight hundred ninety-seven thousand, nine hundred sixty-eight".