16889409 has 12 divisors (see below), whose sum is σ = 24740352. Its totient is φ = 11100600.

The previous prime is 16889407. The next prime is 16889447. The reversal of 16889409 is 90498861.

16889409 is a `hidden beast` number, since 168 + 89 + 409 = 666.

It is not a de Polignac number, because 16889409 - 2¹ = 16889407 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (16889407) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 12577 + ... + 13854.

It is an arithmetic number, because the mean of its divisors is an integer number (2061696).

Almost surely, 2^16889409 is an apocalyptic number.

It is an amenable number.

16889409 is a deficient number, since it is larger than the sum of its proper divisors (7850943).

16889409 is a wasteful number, since it uses less digits than its factorization.

16889409 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26508 (or 26505 counting only the distinct ones).

The product of its (nonzero) digits is 124416, while the sum is 45.

The square root of 16889409 is about 4109.6726146982. The cubic root of 16889409 is about 256.5693758057.

The spelling of 16889409 in words is "sixteen million, eight hundred eighty-nine thousand, four hundred nine".