16644446 has 16 divisors (see below), whose sum is σ = 30728544. Its totient is φ = 6584544.

The previous prime is 16644443. The next prime is 16644449. The reversal of 16644446 is 64444661.

It is an interprime number because it is at equal distance from previous prime (16644443) and next prime (16644449).

It is a Smith number, since the sum of its digits (35) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16644443) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 45545 + ... + 45908.

It is an arithmetic number, because the mean of its divisors is an integer number (1920534).

Almost surely, 2^16644446 is an apocalyptic number.

16644446 is a deficient number, since it is larger than the sum of its proper divisors (14084098).

16644446 is a wasteful number, since it uses less digits than its factorization.

16644446 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 91475.

The product of its digits is 55296, while the sum is 35.

The square root of 16644446 is about 4079.7605321881. The cubic root of 16644446 is about 255.3229076012.

The spelling of 16644446 in words is "sixteen million, six hundred forty-four thousand, four hundred forty-six".