16444986 has 8 divisors (see below), whose sum is σ = 32889984. Its totient is φ = 5481660.

The previous prime is 16444919. The next prime is 16444993. The reversal of 16444986 is 68944461.

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

16444986 is an admirable number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1370410 + ... + 1370421.

It is an arithmetic number, because the mean of its divisors is an integer number (4111248).

Almost surely, 2^16444986 is an apocalyptic number.

16444986 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

16444986 is a wasteful number, since it uses less digits than its factorization.

16444986 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2740836.

The product of its digits is 165888, while the sum is 42.

The square root of 16444986 is about 4055.2417930377. The cubic root of 16444986 is about 254.2989123611.

It can be divided in two parts, 164 and 44986, that added together give a triangular number (45150 = T₃₀₀).

The spelling of 16444986 in words is "sixteen million, four hundred forty-four thousand, nine hundred eighty-six".