189612 has 36 divisors (see below), whose sum is σ = 502320. Its totient is φ = 60192.

The previous prime is 189599. The next prime is 189613. The reversal of 189612 is 216981.

189612 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (36).

It is an alternating number because its digits alternate between odd and even.

It is not an unprimeable number, because it can be changed into a prime (189613) by changing a digit.

189612 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 714 + ... + 942.

2¹⁸⁹⁶¹² is an apocalyptic number.

189612 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 189612, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (251160).

189612 is an abundant number, since it is smaller than the sum of its proper divisors (312708).

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

189612 is a wasteful number, since it uses less digits than its factorization.

189612 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 262 (or 257 counting only the distinct ones).

The product of its digits is 864, while the sum is 27.

The square root of 189612 is about 435.4446003799. Note that the first 3 decimals coincide. The cubic root of 189612 is about 57.4498112781.

The spelling of 189612 in words is "one hundred eighty-nine thousand, six hundred twelve".