16644072 has 16 divisors (see below), whose sum is σ = 41610240. Its totient is φ = 5548016.

The previous prime is 16644059. The next prime is 16644083. The reversal of 16644072 is 27044661.

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, 346728 + ... + 346775.

It is an arithmetic number, because the mean of its divisors is an integer number (2600640).

Almost surely, 2^16644072 is an apocalyptic number.

16644072 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

16644072 is an abundant number, since it is smaller than the sum of its proper divisors (24966168).

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

16644072 is a wasteful number, since it uses less digits than its factorization.

16644072 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 693512 (or 693508 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 30.

The square root of 16644072 is about 4079.7146959071. The cubic root of 16644072 is about 255.3209952219.

The spelling of 16644072 in words is "sixteen million, six hundred forty-four thousand, seventy-two".