856988924 has 96 divisors (see below), whose sum is σ = 1796014080. Its totient is φ = 353707200.

The previous prime is 856988917. The next prime is 856988933. The reversal of 856988924 is 429889658.

It is a Harshad number since it is a multiple of its sum of digits (59).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1850717 + ... + 1851179.

It is an arithmetic number, because the mean of its divisors is an integer number (18708480).

Almost surely, 2^856988924 is an apocalyptic number.

It is an amenable number.

856988924 is an abundant number, since it is smaller than the sum of its proper divisors (939025156).

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

856988924 is a wasteful number, since it uses less digits than its factorization.

856988924 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 591 (or 589 counting only the distinct ones).

The product of its digits is 9953280, while the sum is 59.

The square root of 856988924 is about 29274.3731615213. The cubic root of 856988924 is about 949.8573835773.

The spelling of 856988924 in words is "eight hundred fifty-six million, nine hundred eighty-eight thousand, nine hundred twenty-four".