16644912 has 40 divisors (see below), whose sum is σ = 45264960. Its totient is φ = 5256000.

The previous prime is 16644911. The next prime is 16644919. The reversal of 16644912 is 21944661.

It is not an unprimeable number, because it can be changed into a prime (16644911) 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, 8214 + ... + 10037.

It is an arithmetic number, because the mean of its divisors is an integer number (1131624).

Almost surely, 2^16644912 is an apocalyptic number.

16644912 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

16644912 is an abundant number, since it is smaller than the sum of its proper divisors (28620048).

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

16644912 is a wasteful number, since it uses less digits than its factorization.

16644912 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18281 (or 18275 counting only the distinct ones).

The product of its digits is 10368, while the sum is 33.

The square root of 16644912 is about 4079.8176429836. The cubic root of 16644912 is about 255.3252903653.

The spelling of 16644912 in words is "sixteen million, six hundred forty-four thousand, nine hundred twelve".