864438882 has 24 divisors (see below), whose sum is σ = 1836562416. Its totient is φ = 271195968.

The previous prime is 864438871. The next prime is 864438889. The reversal of 864438882 is 288834468.

It is a Harshad number since it is a multiple of its sum of digits (51).

It is not an unprimeable number, because it can be changed into a prime (864438889) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 247528 + ... + 250995.

It is an arithmetic number, because the mean of its divisors is an integer number (76523434).

Almost surely, 2^864438882 is an apocalyptic number.

864438882 is an abundant number, since it is smaller than the sum of its proper divisors (972123534).

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

864438882 is a wasteful number, since it uses less digits than its factorization.

864438882 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 498562 (or 498545 counting only the distinct ones).

The product of its digits is 2359296, while the sum is 51.

The square root of 864438882 is about 29401.3415000064. The cubic root of 864438882 is about 952.6018728055.

The spelling of 864438882 in words is "eight hundred sixty-four million, four hundred thirty-eight thousand, eight hundred eighty-two".