16644212 has 12 divisors (see below), whose sum is σ = 31368036. Its totient is φ = 7681920.

The previous prime is 16644211. The next prime is 16644223. The reversal of 16644212 is 21244661.

It can be written as a sum of positive squares in 2 ways, for example, as 6120676 + 10523536 = 2474^2 + 3244^2 .

It is a Harshad number since it is a multiple of its sum of digits (26).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16644211) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 159989 + ... + 160092.

It is an arithmetic number, because the mean of its divisors is an integer number (2614003).

Almost surely, 2^16644212 is an apocalyptic number.

It is an amenable number.

16644212 is a deficient number, since it is larger than the sum of its proper divisors (14723824).

16644212 is a wasteful number, since it uses less digits than its factorization.

16644212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 320098 (or 320096 counting only the distinct ones).

The product of its digits is 2304, while the sum is 26.

The square root of 16644212 is about 4079.7318539335. The cubic root of 16644212 is about 255.3217110891.

Adding to 16644212 its reverse (21244661), we get a palindrome (37888873).

The spelling of 16644212 in words is "sixteen million, six hundred forty-four thousand, two hundred twelve".