16418944 has 16 divisors (see below), whose sum is σ = 32709870. Its totient is φ = 8209408.

The previous prime is 16418929. The next prime is 16418947. The reversal of 16418944 is 44981461.

It can be written as a sum of positive squares in only one way, i.e., 16321600 + 97344 = 4040^2 + 312^2 .

It is a tau number, because it is divible by the number of its divisors (16).

It is a Smith number, since the sum of its digits (37) coincides with the sum of the digits of its prime factors.

It is a nialpdrome in base 16.

It is not an unprimeable number, because it can be changed into a prime (16418947) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64009 + ... + 64264.

Almost surely, 2^16418944 is an apocalyptic number.

It is an amenable number.

16418944 is a deficient number, since it is larger than the sum of its proper divisors (16290926).

16418944 is an equidigital number, since it uses as much as digits as its factorization.

16418944 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 128287 (or 128275 counting only the distinct ones).

The product of its digits is 27648, while the sum is 37.

The square root of 16418944 is about 4052.0296148967. The cubic root of 16418944 is about 254.1646069647.

It can be divided in two parts, 1641 and 8944, that added together give a triangular number (10585 = T₁₄₅).

The spelling of 16418944 in words is "sixteen million, four hundred eighteen thousand, nine hundred forty-four".