16644332 has 12 divisors (see below), whose sum is σ = 29677536. Its totient is φ = 8165040.

The previous prime is 16644301. The next prime is 16644337. The reversal of 16644332 is 23344661.

It is a junction number, because it is equal to n+sod(n) for n = 16644295 and 16644304.

It is not an unprimeable number, because it can be changed into a prime (16644337) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 39044 + ... + 39467.

It is an arithmetic number, because the mean of its divisors is an integer number (2473128).

Almost surely, 2^16644332 is an apocalyptic number.

It is an amenable number.

16644332 is a deficient number, since it is larger than the sum of its proper divisors (13033204).

16644332 is a wasteful number, since it uses less digits than its factorization.

16644332 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78568 (or 78566 counting only the distinct ones).

The product of its digits is 10368, while the sum is 29.

The square root of 16644332 is about 4079.7465607559. The cubic root of 16644332 is about 255.3223246865.

Adding to 16644332 its reverse (23344661), we get a palindrome (39988993).

The spelling of 16644332 in words is "sixteen million, six hundred forty-four thousand, three hundred thirty-two".