189336990 has 32 divisors (see below), whose sum is σ = 481140000. Its totient is φ = 47519744.

The previous prime is 189336967. The next prime is 189336991. The reversal of 189336990 is 99633981.

It is a happy number.

189336990 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (189336991) 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, 185115 + ... + 186134.

It is an arithmetic number, because the mean of its divisors is an integer number (15035625).

Almost surely, 2^189336990 is an apocalyptic number.

189336990 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

189336990 is an abundant number, since it is smaller than the sum of its proper divisors (291803010).

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

189336990 is a wasteful number, since it uses less digits than its factorization.

189336990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 371276.

The product of its (nonzero) digits is 314928, while the sum is 48.

The square root of 189336990 is about 13759.9778342845. The cubic root of 189336990 is about 574.2202309823.

It can be divided in two parts, 1893 and 36990, that added together give a palindrome (38883).

The spelling of 189336990 in words is "one hundred eighty-nine million, three hundred thirty-six thousand, nine hundred ninety".