189636 has 12 divisors (see below), whose sum is σ = 442512. Its totient is φ = 63208.

The previous prime is 189619. The next prime is 189643. The reversal of 189636 is 636981.

It is a tau number, because it is divible by the number of its divisors (12).

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

It is a junction number, because it is equal to n+sod(n) for n = 189597 and 189606.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 189636.

It is an unprimeable number.

189636 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, 7890 + ... + 7913.

It is an arithmetic number, because the mean of its divisors is an integer number (36876).

2¹⁸⁹⁶³⁶ is an apocalyptic number.

It is an amenable number.

189636 is an abundant number, since it is smaller than the sum of its proper divisors (252876).

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

189636 is a wasteful number, since it uses less digits than its factorization.

189636 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15810 (or 15808 counting only the distinct ones).

The product of its digits is 7776, while the sum is 33.

The square root of 189636 is about 435.4721575486. The cubic root of 189636 is about 57.4522350651.

The spelling of 189636 in words is "one hundred eighty-nine thousand, six hundred thirty-six".