189331090 has 16 divisors (see below), whose sum is σ = 367011288. Its totient is φ = 69906816.

The previous prime is 189331081. The next prime is 189331097. The reversal of 189331090 is 90133981.

189331090 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 77246521 + 112084569 = 8789^2 + 10587^2 .

It is not an unprimeable number, because it can be changed into a prime (189331097) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 728067 + ... + 728326.

Almost surely, 2^189331090 is an apocalyptic number.

189331090 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

189331090 is a deficient number, since it is larger than the sum of its proper divisors (177680198).

189331090 is a wasteful number, since it uses less digits than its factorization.

189331090 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1456413.

The product of its (nonzero) digits is 5832, while the sum is 34.

The square root of 189331090 is about 13759.7634427340. The cubic root of 189331090 is about 574.2142664240.

The spelling of 189331090 in words is "one hundred eighty-nine million, three hundred thirty-one thousand, ninety".