856916928 has 112 divisors (see below), whose sum is σ = 2879100160. Its totient is φ = 244829952.

The previous prime is 856916897. The next prime is 856916939. The reversal of 856916928 is 829619658.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (112).

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 23326 + ... + 47517.

Almost surely, 2^856916928 is an apocalyptic number.

It is an amenable number.

856916928 is an abundant number, since it is smaller than the sum of its proper divisors (2022183232).

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

856916928 is a wasteful number, since it uses less digits than its factorization.

856916928 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70871 (or 70855 counting only the distinct ones).

The product of its digits is 1866240, while the sum is 54.

The square root of 856916928 is about 29273.1434594920. The cubic root of 856916928 is about 949.8307835263.

The spelling of 856916928 in words is "eight hundred fifty-six million, nine hundred sixteen thousand, nine hundred twenty-eight".