16393864 has 16 divisors (see below), whose sum is σ = 30975120. Its totient is φ = 8133840.

The previous prime is 16393859. The next prime is 16393877. The reversal of 16393864 is 46839361.

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, 6774 + ... + 8869.

It is an arithmetic number, because the mean of its divisors is an integer number (1935945).

Almost surely, 2^16393864 is an apocalyptic number.

It is an amenable number.

16393864 is a deficient number, since it is larger than the sum of its proper divisors (14581256).

16393864 is a wasteful number, since it uses less digits than its factorization.

16393864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15780 (or 15776 counting only the distinct ones).

The product of its digits is 93312, while the sum is 40.

The square root of 16393864 is about 4048.9336867872. The cubic root of 16393864 is about 254.0351285451.

The spelling of 16393864 in words is "sixteen million, three hundred ninety-three thousand, eight hundred sixty-four".