16003864 has 16 divisors (see below), whose sum is σ = 30088800. Its totient is φ = 7980192.

The previous prime is 16003859. The next prime is 16003903. The reversal of 16003864 is 46830061.

It is a super-2 number, since 2×16003864² = 512247325860992, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 657 + ... + 5695.

It is an arithmetic number, because the mean of its divisors is an integer number (1880550).

Almost surely, 2^16003864 is an apocalyptic number.

It is an amenable number.

16003864 is a deficient number, since it is larger than the sum of its proper divisors (14084936).

16003864 is a wasteful number, since it uses less digits than its factorization.

16003864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5442 (or 5438 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 28.

The square root of 16003864 is about 4000.4829708424. The cubic root of 16003864 is about 252.0044930752.

The spelling of 16003864 in words is "sixteen million, three thousand, eight hundred sixty-four".