16644146 has 8 divisors (see below), whose sum is σ = 25308444. Its totient is φ = 8208000.

The previous prime is 16644137. The next prime is 16644149. The reversal of 16644146 is 64144661.

It can be written as a sum of positive squares in 2 ways, for example, as 16313521 + 330625 = 4039^2 + 575^2 .

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

It is not an unprimeable number, because it can be changed into a prime (16644149) 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, 56855 + ... + 57146.

Almost surely, 2^16644146 is an apocalyptic number.

16644146 is a deficient number, since it is larger than the sum of its proper divisors (8664298).

16644146 is a wasteful number, since it uses less digits than its factorization.

16644146 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 114076.

The product of its digits is 13824, while the sum is 32.

The square root of 16644146 is about 4079.7237651586. The cubic root of 16644146 is about 255.3213736094.

The spelling of 16644146 in words is "sixteen million, six hundred forty-four thousand, one hundred forty-six".