856683872 has 36 divisors (see below), whose sum is σ = 1853870508. Its totient is φ = 389400000.

The previous prime is 856683871. The next prime is 856683881. The reversal of 856683872 is 278386658.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (856683871) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 106754 + ... + 114497.

It is an arithmetic number, because the mean of its divisors is an integer number (51496403).

Almost surely, 2^856683872 is an apocalyptic number.

It is an amenable number.

856683872 is an abundant number, since it is smaller than the sum of its proper divisors (997186636).

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

856683872 is a wasteful number, since it uses less digits than its factorization.

856683872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 221283 (or 221264 counting only the distinct ones).

The product of its digits is 3870720, while the sum is 53.

The square root of 856683872 is about 29269.1624752059. The cubic root of 856683872 is about 949.7446671140.

The spelling of 856683872 in words is "eight hundred fifty-six million, six hundred eighty-three thousand, eight hundred seventy-two".