871686984 has 64 divisors (see below), whose sum is σ = 2493619200. Its totient is φ = 248745024.

The previous prime is 871686967. The next prime is 871687007. The reversal of 871686984 is 489686178.

It is a hoax number, since the sum of its digits (57) coincides with the sum of the digits of its distinct prime factors.

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, 156357 + ... + 161835.

It is an arithmetic number, because the mean of its divisors is an integer number (38962800).

Almost surely, 2^871686984 is an apocalyptic number.

871686984 is a gapful number since it is divisible by the number (84) formed by its first and last digit.

It is an amenable number.

871686984 is an abundant number, since it is smaller than the sum of its proper divisors (1621932216).

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

871686984 is a wasteful number, since it uses less digits than its factorization.

871686984 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6442 (or 6438 counting only the distinct ones).

The product of its digits is 4644864, while the sum is 57.

The square root of 871686984 is about 29524.3456151021. The cubic root of 871686984 is about 955.2569081213.

The spelling of 871686984 in words is "eight hundred seventy-one million, six hundred eighty-six thousand, nine hundred eighty-four".