16388944 has 120 divisors (see below), whose sum is σ = 40845600. Its totient is φ = 6289920.

The previous prime is 16388929. The next prime is 16388951. The reversal of 16388944 is 44988361.

It is a self number, because there is not a number n which added to its sum of digits gives 16388944.

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 in 23 ways as a sum of consecutive naturals, for example, 565122 + ... + 565150.

It is an arithmetic number, because the mean of its divisors is an integer number (340380).

Almost surely, 2^16388944 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 16388944, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20422800).

16388944 is an abundant number, since it is smaller than the sum of its proper divisors (24456656).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

16388944 is a wasteful number, since it uses less digits than its factorization.

16388944 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 93 (or 74 counting only the distinct ones).

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

The square root of 16388944 is about 4048.3260738236. The cubic root of 16388944 is about 254.0097129813.

The spelling of 16388944 in words is "sixteen million, three hundred eighty-eight thousand, nine hundred forty-four".