12222228 has 24 divisors (see below), whose sum is σ = 28575232. Its totient is φ = 4065984.

The previous prime is 12222211. The next prime is 12222241. The reversal of 12222228 is 82222221.

It is a plaindrome in base 10.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10701 + ... + 11787.

Almost surely, 2^12222228 is an apocalyptic number.

It is an amenable number.

12222228 is an abundant number, since it is smaller than the sum of its proper divisors (16353004).

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

12222228 is a wasteful number, since it uses less digits than its factorization.

12222228 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2031 (or 2029 counting only the distinct ones).

The product of its digits is 512, while the sum is 21.

The square root of 12222228 is about 3496.0303202347. The cubic root of 12222228 is about 230.3474772975.

Adding to 12222228 its reverse (82222221), we get a palindrome (94444449).

The spelling of 12222228 in words is "twelve million, two hundred twenty-two thousand, two hundred twenty-eight".