16644416 has 28 divisors (see below), whose sum is σ = 33284160. Its totient is φ = 8257920.

The previous prime is 16644403. The next prime is 16644443. The reversal of 16644416 is 61444661.

It is a super-3 number, since 3×16644416³ (a number of 23 digits) contains 333 as substring.

It is a hoax number, since the sum of its digits (32) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (32).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7961 + ... + 9831.

It is an arithmetic number, because the mean of its divisors is an integer number (1188720).

Almost surely, 2^16644416 is an apocalyptic number.

16644416 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

16644416 is a deficient number, since it is larger than the sum of its proper divisors (16639744).

16644416 is a wasteful number, since it uses less digits than its factorization.

16644416 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2022 (or 2012 counting only the distinct ones).

The product of its digits is 13824, while the sum is 32.

The square root of 16644416 is about 4079.7568555001. The cubic root of 16644416 is about 255.3227542028.

The spelling of 16644416 in words is "sixteen million, six hundred forty-four thousand, four hundred sixteen".