863923984 has 80 divisors (see below), whose sum is σ = 2093008896. Its totient is φ = 335606400.

The previous prime is 863923937. The next prime is 863924021. The reversal of 863923984 is 489329368.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 530179 + ... + 531805.

Almost surely, 2^863923984 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 863923984, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1046504448).

863923984 is an abundant number, since it is smaller than the sum of its proper divisors (1229084912).

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

863923984 is a wasteful number, since it uses less digits than its factorization.

863923984 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2084 (or 2078 counting only the distinct ones).

The product of its digits is 2239488, while the sum is 52.

The square root of 863923984 is about 29392.5838265369. The cubic root of 863923984 is about 952.4126979825.

It can be divided in two parts, 8639 and 23984, that added together give a palindrome (32623).

The spelling of 863923984 in words is "eight hundred sixty-three million, nine hundred twenty-three thousand, nine hundred eighty-four".