16644454 has 8 divisors (see below), whose sum is σ = 24993360. Its totient is φ = 8313336.

The previous prime is 16644449. The next prime is 16644469. The reversal of 16644454 is 45444661.

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

It is a congruent number.

It is an unprimeable number.

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, 1789 + ... + 6040.

It is an arithmetic number, because the mean of its divisors is an integer number (3124170).

Almost surely, 2^16644454 is an apocalyptic number.

16644454 is a deficient number, since it is larger than the sum of its proper divisors (8348906).

16644454 is a wasteful number, since it uses less digits than its factorization.

16644454 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8894.

The product of its digits is 46080, while the sum is 34.

The square root of 16644454 is about 4079.7615126377. The cubic root of 16644454 is about 255.3229485074.

The spelling of 16644454 in words is "sixteen million, six hundred forty-four thousand, four hundred fifty-four".