18839444 has 54 divisors (see below), whose sum is σ = 38160990. Its totient is φ = 8124480.

The previous prime is 18839407. The next prime is 18839477. The reversal of 18839444 is 44493881.

It can be written as a sum of positive squares in 3 ways, for example, as 3844 + 18835600 = 62^2 + 4340^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 607709 + ... + 607739.

It is an arithmetic number, because the mean of its divisors is an integer number (706685).

Almost surely, 2^18839444 is an apocalyptic number.

It is an amenable number.

18839444 is an abundant number, since it is smaller than the sum of its proper divisors (19321546).

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

18839444 is a wasteful number, since it uses less digits than its factorization.

18839444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 121 (or 75 counting only the distinct ones).

The product of its digits is 110592, while the sum is 41.

The square root of 18839444 is about 4340.4428345504. The cubic root of 18839444 is about 266.0864098261.

The spelling of 18839444 in words is "eighteen million, eight hundred thirty-nine thousand, four hundred forty-four".