189992 has 32 divisors (see below), whose sum is σ = 414720. Its totient is φ = 80640.

The previous prime is 189989. The next prime is 189997. The reversal of 189992 is 299981.

It is not an unprimeable number, because it can be changed into a prime (189997) 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, 1433 + ... + 1559.

It is an arithmetic number, because the mean of its divisors is an integer number (12960).

2¹⁸⁹⁹⁹² is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 189992, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (207360).

189992 is an abundant number, since it is smaller than the sum of its proper divisors (224728).

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

189992 is a wasteful number, since it uses less digits than its factorization.

189992 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 161 (or 157 counting only the distinct ones).

The product of its digits is 11664, while the sum is 38.

The square root of 189992 is about 435.8807176281. The cubic root of 189992 is about 57.4881639154.

It can be divided in two parts, 1899 and 92, that added together give a palindrome (1991).

The spelling of 189992 in words is "one hundred eighty-nine thousand, nine hundred ninety-two".