16644344 has 8 divisors (see below), whose sum is σ = 31208160. Its totient is φ = 8322168.

The previous prime is 16644337. The next prime is 16644349. The reversal of 16644344 is 44344661.

It is a tau number, because it is divible by the number of its divisors (8).

It is a self number, because there is not a number n which added to its sum of digits gives 16644344.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16644349) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1040264 + ... + 1040279.

It is an arithmetic number, because the mean of its divisors is an integer number (3901020).

Almost surely, 2^16644344 is an apocalyptic number.

It is an amenable number.

16644344 is a deficient number, since it is larger than the sum of its proper divisors (14563816).

16644344 is a wasteful number, since it uses less digits than its factorization.

16644344 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2080549 (or 2080545 counting only the distinct ones).

The product of its digits is 27648, while the sum is 32.

The square root of 16644344 is about 4079.7480314353. The cubic root of 16644344 is about 255.3223860460.

The spelling of 16644344 in words is "sixteen million, six hundred forty-four thousand, three hundred forty-four".