189038090 has 16 divisors (see below), whose sum is σ = 340452072. Its totient is φ = 75574464.

The previous prime is 189038071. The next prime is 189038107. The reversal of 189038090 is 90830981.

It can be written as a sum of positive squares in 4 ways, for example, as 188980009 + 58081 = 13747^2 + 241^2 .

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 7 ways as a sum of consecutive naturals, for example, 20492 + ... + 28248.

Almost surely, 2^189038090 is an apocalyptic number.

189038090 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

189038090 is a deficient number, since it is larger than the sum of its proper divisors (151413982).

189038090 is a wasteful number, since it uses less digits than its factorization.

189038090 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10201.

The product of its (nonzero) digits is 15552, while the sum is 38.

The square root of 189038090 is about 13749.1123349837. The cubic root of 189038090 is about 573.9179043843.

The spelling of 189038090 in words is "one hundred eighty-nine million, thirty-eight thousand, ninety".