189444445 has 16 divisors (see below), whose sum is σ = 238096512. Its totient is φ = 144429120.

The previous prime is 189444427. The next prime is 189444469. The reversal of 189444445 is 544444981.

It is not a de Polignac number, because 189444445 - 2¹¹ = 189442397 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 29635 + ... + 35455.

It is an arithmetic number, because the mean of its divisors is an integer number (14881032).

Almost surely, 2^189444445 is an apocalyptic number.

It is an amenable number.

189444445 is a deficient number, since it is larger than the sum of its proper divisors (48652067).

189444445 is a wasteful number, since it uses less digits than its factorization.

189444445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6132.

The product of its digits is 368640, while the sum is 43.

The square root of 189444445 is about 13763.8819015567. The cubic root of 189444445 is about 574.3288400921.

The spelling of 189444445 in words is "one hundred eighty-nine million, four hundred forty-four thousand, four hundred forty-five".