16691872 has 24 divisors (see below), whose sum is σ = 33046272. Its totient is φ = 8299200.

The previous prime is 16691839. The next prime is 16691891. The reversal of 16691872 is 27819661.

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 3 ways as a sum of consecutive naturals, for example, 4747 + ... + 7477.

It is an arithmetic number, because the mean of its divisors is an integer number (1376928).

Almost surely, 2^16691872 is an apocalyptic number.

It is an amenable number.

16691872 is a deficient number, since it is larger than the sum of its proper divisors (16354400).

16691872 is a wasteful number, since it uses less digits than its factorization.

16691872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2932 (or 2924 counting only the distinct ones).

The product of its digits is 36288, while the sum is 40.

The square root of 16691872 is about 4085.5687486567. The cubic root of 16691872 is about 255.5651798378.

The spelling of 16691872 in words is "sixteen million, six hundred ninety-one thousand, eight hundred seventy-two".