189109726 has 32 divisors (see below), whose sum is σ = 322882560. Its totient is φ = 82409184.

The previous prime is 189109721. The next prime is 189109727. The reversal of 189109726 is 627901981.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (189109721) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 45241 + ... + 49243.

It is an arithmetic number, because the mean of its divisors is an integer number (10090080).

Almost surely, 2^189109726 is an apocalyptic number.

189109726 is a deficient number, since it is larger than the sum of its proper divisors (133772834).

189109726 is a wasteful number, since it uses less digits than its factorization.

189109726 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4120.

The product of its (nonzero) digits is 54432, while the sum is 43.

The square root of 189109726 is about 13751.7172018625. The cubic root of 189109726 is about 573.9903906415.

The spelling of 189109726 in words is "one hundred eighty-nine million, one hundred nine thousand, seven hundred twenty-six".