189444 has 12 divisors (see below), whose sum is σ = 442064. Its totient is φ = 63144.

The previous prime is 189439. The next prime is 189463. The reversal of 189444 is 444981.

It is a tau number, because it is divible by the number of its divisors (12).

It is an Ulam number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 189444.

It is an unprimeable number.

189444 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7882 + ... + 7905.

2¹⁸⁹⁴⁴⁴ is an apocalyptic number.

It is an amenable number.

189444 is an abundant number, since it is smaller than the sum of its proper divisors (252620).

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

189444 is a wasteful number, since it uses less digits than its factorization.

189444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15794 (or 15792 counting only the distinct ones).

The product of its digits is 4608, while the sum is 30.

The square root of 189444 is about 435.2516513467. The cubic root of 189444 is about 57.4328390397.

The spelling of 189444 in words is "one hundred eighty-nine thousand, four hundred forty-four".