16444143 has 6 divisors (see below), whose sum is σ = 23752664. Its totient is φ = 10962756.

The previous prime is 16444133. The next prime is 16444159. The reversal of 16444143 is 34144461.

16444143 is a `hidden beast` number, since 1 + 644 + 4 + 14 + 3 = 666.

It is not a de Polignac number, because 16444143 - 2⁵ = 16444111 is a prime.

It is a super-3 number, since 3×16444143³ (a number of 23 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16444123) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 913555 + ... + 913572.

Almost surely, 2^16444143 is an apocalyptic number.

16444143 is a deficient number, since it is larger than the sum of its proper divisors (7308521).

16444143 is a wasteful number, since it uses less digits than its factorization.

16444143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1827133 (or 1827130 counting only the distinct ones).

The product of its digits is 4608, while the sum is 27.

The square root of 16444143 is about 4055.1378521574. The cubic root of 16444143 is about 254.2945670113.

The spelling of 16444143 in words is "sixteen million, four hundred forty-four thousand, one hundred forty-three".