189816158 has 16 divisors (see below), whose sum is σ = 325929984. Its totient is φ = 81217080.

The previous prime is 189816149. The next prime is 189816163. The reversal of 189816158 is 851618981.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1910 + ... + 19577.

It is an arithmetic number, because the mean of its divisors is an integer number (20370624).

Almost surely, 2^189816158 is an apocalyptic number.

189816158 is a deficient number, since it is larger than the sum of its proper divisors (136113826).

189816158 is a wasteful number, since it uses less digits than its factorization.

189816158 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22127.

The product of its digits is 138240, while the sum is 47.

The square root of 189816158 is about 13777.3784879417. The cubic root of 189816158 is about 574.7042289825.

The spelling of 189816158 in words is "one hundred eighty-nine million, eight hundred sixteen thousand, one hundred fifty-eight".