16389844 has 12 divisors (see below), whose sum is σ = 29028384. Its totient is φ = 8096024.

The previous prime is 16389833. The next prime is 16389883. The reversal of 16389844 is 44898361.

It is a self number, because there is not a number n which added to its sum of digits gives 16389844.

It is a congruent number.

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, 24352 + ... + 25015.

It is an arithmetic number, because the mean of its divisors is an integer number (2419032).

Almost surely, 2^16389844 is an apocalyptic number.

It is an amenable number.

16389844 is a deficient number, since it is larger than the sum of its proper divisors (12638540).

16389844 is a wasteful number, since it uses less digits than its factorization.

16389844 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49454 (or 49452 counting only the distinct ones).

The product of its digits is 165888, while the sum is 43.

The square root of 16389844 is about 4048.4372293516. The cubic root of 16389844 is about 254.0143625499.

The spelling of 16389844 in words is "sixteen million, three hundred eighty-nine thousand, eight hundred forty-four".