189418290 has 32 divisors (see below), whose sum is σ = 463185216. Its totient is φ = 49558080.

The previous prime is 189418279. The next prime is 189418303. The reversal of 189418290 is 92814981.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 57976 + ... + 61155.

It is an arithmetic number, because the mean of its divisors is an integer number (14474538).

Almost surely, 2^189418290 is an apocalyptic number.

189418290 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

189418290 is an abundant number, since it is smaller than the sum of its proper divisors (273766926).

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

189418290 is a wasteful number, since it uses less digits than its factorization.

189418290 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 119194.

The product of its (nonzero) digits is 41472, while the sum is 42.

The square root of 189418290 is about 13762.9317370973. The cubic root of 189418290 is about 574.3024079594.

The spelling of 189418290 in words is "one hundred eighty-nine million, four hundred eighteen thousand, two hundred ninety".