12228189 has 4 divisors (see below), whose sum is σ = 16304256. Its totient is φ = 8152124.

The previous prime is 12228187. The next prime is 12228197. The reversal of 12228189 is 98182221.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 12228189 - 2¹ = 12228187 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12228187) 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, 2038029 + ... + 2038034.

It is an arithmetic number, because the mean of its divisors is an integer number (4076064).

Almost surely, 2^12228189 is an apocalyptic number.

It is an amenable number.

12228189 is a deficient number, since it is larger than the sum of its proper divisors (4076067).

12228189 is an equidigital number, since it uses as much as digits as its factorization.

12228189 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4076066.

The product of its digits is 4608, while the sum is 33.

The square root of 12228189 is about 3496.8827546831. The cubic root of 12228189 is about 230.3849194110.

The spelling of 12228189 in words is "twelve million, two hundred twenty-eight thousand, one hundred eighty-nine".