16443944 has 32 divisors (see below), whose sum is σ = 34149600. Its totient is φ = 7360320.

The previous prime is 16443901. The next prime is 16443971. The reversal of 16443944 is 44934461.

It is a super-3 number, since 3×16443944³ (a number of 23 digits) contains 333 as substring.

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 7 ways as a sum of consecutive naturals, for example, 4502 + ... + 7290.

It is an arithmetic number, because the mean of its divisors is an integer number (1067175).

Almost surely, 2^16443944 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 16443944, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (17074800).

16443944 is an abundant number, since it is smaller than the sum of its proper divisors (17705656).

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

16443944 is a wasteful number, since it uses less digits than its factorization.

16443944 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2873 (or 2869 counting only the distinct ones).

The product of its digits is 41472, while the sum is 35.

The square root of 16443944 is about 4055.1133153095. The cubic root of 16443944 is about 254.2935412191.

The spelling of 16443944 in words is "sixteen million, four hundred forty-three thousand, nine hundred forty-four".