12189908 has 12 divisors (see below), whose sum is σ = 22260000. Its totient is φ = 5829912.

The previous prime is 12189907. The next prime is 12189911. The reversal of 12189908 is 80998121.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12189907) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 66158 + ... + 66341.

It is an arithmetic number, because the mean of its divisors is an integer number (1855000).

Almost surely, 2^12189908 is an apocalyptic number.

It is an amenable number.

12189908 is a deficient number, since it is larger than the sum of its proper divisors (10070092).

12189908 is a wasteful number, since it uses less digits than its factorization.

12189908 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 132526 (or 132524 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 38.

The square root of 12189908 is about 3491.4048748319. The cubic root of 12189908 is about 230.1442573281.

The spelling of 12189908 in words is "twelve million, one hundred eighty-nine thousand, nine hundred eight".