856884980 has 24 divisors (see below), whose sum is σ = 2056524288. Its totient is φ = 293789088.

The previous prime is 856884967. The next prime is 856885039. The reversal of 856884980 is 89488658.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3060164 + ... + 3060443.

It is an arithmetic number, because the mean of its divisors is an integer number (85688512).

Almost surely, 2^856884980 is an apocalyptic number.

It is an amenable number.

856884980 is an abundant number, since it is smaller than the sum of its proper divisors (1199639308).

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

856884980 is a wasteful number, since it uses less digits than its factorization.

856884980 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6120623 (or 6120621 counting only the distinct ones).

The product of its (nonzero) digits is 4423680, while the sum is 56.

The square root of 856884980 is about 29272.5977665119. The cubic root of 856884980 is about 949.8189793595.

The spelling of 856884980 in words is "eight hundred fifty-six million, eight hundred eighty-four thousand, nine hundred eighty".