189912 has 32 divisors (see below), whose sum is σ = 488880. Its totient is φ = 61440.

The previous prime is 189901. The next prime is 189913. The reversal of 189912 is 219981.

It is a self number, because there is not a number n which added to its sum of digits gives 189912.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (189913) 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, 888 + ... + 1080.

2¹⁸⁹⁹¹² is an apocalyptic number.

189912 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 189912, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (244440).

189912 is an abundant number, since it is smaller than the sum of its proper divisors (298968).

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

189912 is a wasteful number, since it uses less digits than its factorization.

189912 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 243 (or 239 counting only the distinct ones).

The product of its digits is 1296, while the sum is 30.

The square root of 189912 is about 435.7889397403. The cubic root of 189912 is about 57.4800939286.

The spelling of 189912 in words is "one hundred eighty-nine thousand, nine hundred twelve".