12226188 has 48 divisors (see below), whose sum is σ = 30963296. Its totient is φ = 3732480.

The previous prime is 12226187. The next prime is 12226217. The reversal of 12226188 is 88162221.

12226188 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×12226188² = 298959346022688, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (12226187) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 28020 + ... + 28452.

Almost surely, 2^12226188 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12226188, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15481648).

12226188 is an abundant number, since it is smaller than the sum of its proper divisors (18737108).

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

12226188 is a wasteful number, since it uses less digits than its factorization.

12226188 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 634 (or 632 counting only the distinct ones).

The product of its digits is 3072, while the sum is 30.

The square root of 12226188 is about 3496.5966310114. The cubic root of 12226188 is about 230.3723521270.

The spelling of 12226188 in words is "twelve million, two hundred twenty-six thousand, one hundred eighty-eight".