16989976 has 8 divisors (see below), whose sum is σ = 31856220. Its totient is φ = 8494984.

The previous prime is 16989967. The next prime is 16989991. The reversal of 16989976 is 67998961.

It is a tau number, because it is divible by the number of its divisors (8).

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 as a sum of consecutive naturals, namely, 1061866 + ... + 1061881.

Almost surely, 2^16989976 is an apocalyptic number.

It is an amenable number.

16989976 is a deficient number, since it is larger than the sum of its proper divisors (14866244).

16989976 is a wasteful number, since it uses less digits than its factorization.

16989976 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2123753 (or 2123749 counting only the distinct ones).

The product of its digits is 1469664, while the sum is 55.

The square root of 16989976 is about 4121.8898578201. The cubic root of 16989976 is about 257.0776108417.

The spelling of 16989976 in words is "sixteen million, nine hundred eighty-nine thousand, nine hundred seventy-six".