16644441 has 8 divisors (see below), whose sum is σ = 24210144. Its totient is φ = 10087520.

The previous prime is 16644403. The next prime is 16644443. The reversal of 16644441 is 14444661.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 16644441 - 2⁹ = 16643929 is a prime.

It is a super-3 number, since 3×16644441³ (a number of 23 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 16644399 and 16644408.

It is not an unprimeable number, because it can be changed into a prime (16644443) 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 7 ways as a sum of consecutive naturals, for example, 252156 + ... + 252221.

It is an arithmetic number, because the mean of its divisors is an integer number (3026268).

Almost surely, 2^16644441 is an apocalyptic number.

16644441 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

16644441 is a deficient number, since it is larger than the sum of its proper divisors (7565703).

16644441 is a wasteful number, since it uses less digits than its factorization.

16644441 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 504391.

The product of its digits is 9216, while the sum is 30.

The square root of 16644441 is about 4079.7599194070. The cubic root of 16644441 is about 255.3228820348.

It can be divided in two parts, 1664 and 4441, that added together give a triangular number (6105 = T₁₁₀).

The spelling of 16644441 in words is "sixteen million, six hundred forty-four thousand, four hundred forty-one".