856953868 has 12 divisors (see below), whose sum is σ = 1503628840. Its totient is φ = 427345632.

The previous prime is 856953821. The next prime is 856953871. The reversal of 856953868 is 868359658.

It is a happy number.

It is a super-2 number, since 2×856953868² = 1468739863760322848, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 281121 + ... + 284152.

Almost surely, 2^856953868 is an apocalyptic number.

It is an amenable number.

856953868 is a deficient number, since it is larger than the sum of its proper divisors (646674972).

856953868 is a wasteful number, since it uses less digits than its factorization.

856953868 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 565656 (or 565654 counting only the distinct ones).

The product of its digits is 12441600, while the sum is 58.

The square root of 856953868 is about 29273.7744064547. The cubic root of 856953868 is about 949.8444317745.

The spelling of 856953868 in words is "eight hundred fifty-six million, nine hundred fifty-three thousand, eight hundred sixty-eight".