189423330 has 64 divisors (see below), whose sum is σ = 471426048. Its totient is φ = 48660480.

The previous prime is 189423329. The next prime is 189423337. The reversal of 189423330 is 33324981.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 189423291 and 189423300.

It is not an unprimeable number, because it can be changed into a prime (189423337) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 328002 + ... + 328578.

It is an arithmetic number, because the mean of its divisors is an integer number (7366032).

Almost surely, 2^189423330 is an apocalyptic number.

189423330 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 189423330, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (235713024).

189423330 is an abundant number, since it is smaller than the sum of its proper divisors (282002718).

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

189423330 is a wasteful number, since it uses less digits than its factorization.

189423330 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 971.

The product of its (nonzero) digits is 15552, while the sum is 33.

The square root of 189423330 is about 13763.1148364024. The cubic root of 189423330 is about 574.3075015514.

The spelling of 189423330 in words is "one hundred eighty-nine million, four hundred twenty-three thousand, three hundred thirty".