16890904 has 8 divisors (see below), whose sum is σ = 31670460. Its totient is φ = 8445448.

The previous prime is 16890859. The next prime is 16890917. The reversal of 16890904 is 40909861.

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 polite number, since it can be written as a sum of consecutive naturals, namely, 1055674 + ... + 1055689.

Almost surely, 2^16890904 is an apocalyptic number.

It is an amenable number.

16890904 is a deficient number, since it is larger than the sum of its proper divisors (14779556).

16890904 is a wasteful number, since it uses less digits than its factorization.

16890904 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2111369 (or 2111365 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 37.

The square root of 16890904 is about 4109.8544986410. The cubic root of 16890904 is about 256.5769458338.

The spelling of 16890904 in words is "sixteen million, eight hundred ninety thousand, nine hundred four".