16939844 has 24 divisors (see below), whose sum is σ = 30391200. Its totient is φ = 8259200.

The previous prime is 16939843. The next prime is 16939861. The reversal of 16939844 is 44893961.

It is a junction number, because it is equal to n+sod(n) for n = 16939795 and 16939804.

It is not an unprimeable number, because it can be changed into a prime (16939843) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 42044 + ... + 42444.

It is an arithmetic number, because the mean of its divisors is an integer number (1266300).

Almost surely, 2^16939844 is an apocalyptic number.

It is an amenable number.

16939844 is a deficient number, since it is larger than the sum of its proper divisors (13451356).

16939844 is a wasteful number, since it uses less digits than its factorization.

16939844 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 643 (or 641 counting only the distinct ones).

The product of its digits is 186624, while the sum is 44.

The square root of 16939844 is about 4115.8041741560. The cubic root of 16939844 is about 256.8245103949.

The spelling of 16939844 in words is "sixteen million, nine hundred thirty-nine thousand, eight hundred forty-four".