439905864 has 64 divisors (see below), whose sum is σ = 1117247040. Its totient is φ = 144322560.

The previous prime is 439905859. The next prime is 439905871. The reversal of 439905864 is 468509934.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 542019 + ... + 542829.

It is an arithmetic number, because the mean of its divisors is an integer number (17456985).

Almost surely, 2^439905864 is an apocalyptic number.

It is an amenable number.

439905864 is an abundant number, since it is smaller than the sum of its proper divisors (677341176).

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

439905864 is a wasteful number, since it uses less digits than its factorization.

439905864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1150 (or 1146 counting only the distinct ones).

The product of its (nonzero) digits is 933120, while the sum is 48.

The square root of 439905864 is about 20973.9329645157. The cubic root of 439905864 is about 760.5362466574.

The spelling of 439905864 in words is "four hundred thirty-nine million, nine hundred five thousand, eight hundred sixty-four".