16889644 has 12 divisors (see below), whose sum is σ = 29728944. Its totient is φ = 8395664.

The previous prime is 16889641. The next prime is 16889671. The reversal of 16889644 is 44698861.

It is a junction number, because it is equal to n+sod(n) for n = 16889594 and 16889603.

It is not an unprimeable number, because it can be changed into a prime (16889641) by changing a digit.

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 in 3 ways as a sum of consecutive naturals, for example, 11512 + ... + 12895.

It is an arithmetic number, because the mean of its divisors is an integer number (2477412).

Almost surely, 2^16889644 is an apocalyptic number.

It is an amenable number.

16889644 is a deficient number, since it is larger than the sum of its proper divisors (12839300).

16889644 is a wasteful number, since it uses less digits than its factorization.

16889644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24584 (or 24582 counting only the distinct ones).

The product of its digits is 331776, while the sum is 46.

The square root of 16889644 is about 4109.7012056839. The cubic root of 16889644 is about 256.5705657728.

The spelling of 16889644 in words is "sixteen million, eight hundred eighty-nine thousand, six hundred forty-four".