189812 has 12 divisors (see below), whose sum is σ = 379680. Its totient is φ = 81336.

The previous prime is 189799. The next prime is 189817. The reversal of 189812 is 218981.

189812 is an admirable number.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (189817) by changing a digit.

189812 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 3 ways as a sum of consecutive naturals, for example, 3362 + ... + 3417.

It is an arithmetic number, because the mean of its divisors is an integer number (31640).

2¹⁸⁹⁸¹² is an apocalyptic number.

It is an amenable number.

189812 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

189812 is a wasteful number, since it uses less digits than its factorization.

189812 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6790 (or 6788 counting only the distinct ones).

The product of its digits is 1152, while the sum is 29.

The square root of 189812 is about 435.6741901926. The cubic root of 189812 is about 57.4700032575.

It can be divided in two parts, 189 and 812, that added together give a palindrome (1001).

The spelling of 189812 in words is "one hundred eighty-nine thousand, eight hundred twelve".