863871984 has 60 divisors (see below), whose sum is σ = 2421607656. Its totient is φ = 287485056.

The previous prime is 863871961. The next prime is 863871997. The reversal of 863871984 is 489178368.

It is a self number, because there is not a number n which added to its sum of digits gives 863871984.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 89439 + ... + 98625.

Almost surely, 2^863871984 is an apocalyptic number.

It is an amenable number.

863871984 is an abundant number, since it is smaller than the sum of its proper divisors (1557735672).

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

863871984 is a wasteful number, since it uses less digits than its factorization.

863871984 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9854 (or 9845 counting only the distinct ones).

The product of its digits is 2322432, while the sum is 54.

The square root of 863871984 is about 29391.6992363490. The cubic root of 863871984 is about 952.3935888730.

The spelling of 863871984 in words is "eight hundred sixty-three million, eight hundred seventy-one thousand, nine hundred eighty-four".