189912212 has 12 divisors (see below), whose sum is σ = 379824480. Its totient is φ = 81390936.

The previous prime is 189912187. The next prime is 189912223. The reversal of 189912212 is 212219981.

189912212 is an admirable number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3391262 + ... + 3391317.

It is an arithmetic number, because the mean of its divisors is an integer number (31652040).

Almost surely, 2^189912212 is an apocalyptic number.

It is an amenable number.

189912212 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.

189912212 is a wasteful number, since it uses less digits than its factorization.

189912212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6782590 (or 6782588 counting only the distinct ones).

The product of its digits is 5184, while the sum is 35.

The square root of 189912212 is about 13780.8639787206. The cubic root of 189912212 is about 574.8011531708.

The spelling of 189912212 in words is "one hundred eighty-nine million, nine hundred twelve thousand, two hundred twelve".