16939864 has 16 divisors (see below), whose sum is σ = 31806000. Its totient is φ = 8458272.

The previous prime is 16939861. The next prime is 16939889. The reversal of 16939864 is 46893961.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16939861) by changing a digit.

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, 10162 + ... + 11710.

It is an arithmetic number, because the mean of its divisors is an integer number (1987875).

Almost surely, 2^16939864 is an apocalyptic number.

It is an amenable number.

16939864 is a deficient number, since it is larger than the sum of its proper divisors (14866136).

16939864 is a wasteful number, since it uses less digits than its factorization.

16939864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2922 (or 2918 counting only the distinct ones).

The product of its digits is 279936, while the sum is 46.

The square root of 16939864 is about 4115.8066038141. The cubic root of 16939864 is about 256.8246114680.

The spelling of 16939864 in words is "sixteen million, nine hundred thirty-nine thousand, eight hundred sixty-four".