12312228 has 24 divisors (see below), whose sum is σ = 30241120. Its totient is φ = 3888000.

The previous prime is 12312227. The next prime is 12312241. The reversal of 12312228 is 82221321.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (12312221) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 26773 + ... + 27228.

Almost surely, 2^12312228 is an apocalyptic number.

It is an amenable number.

12312228 is an abundant number, since it is smaller than the sum of its proper divisors (17928892).

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

12312228 is a wasteful number, since it uses less digits than its factorization.

12312228 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54027 (or 54025 counting only the distinct ones).

The product of its digits is 384, while the sum is 21.

The square root of 12312228 is about 3508.8784532953. The cubic root of 12312228 is about 230.9114932386.

Adding to 12312228 its reverse (82221321), we get a palindrome (94533549).

The spelling of 12312228 in words is "twelve million, three hundred twelve thousand, two hundred twenty-eight".