12228 has 12 divisors (see below), whose sum is σ = 28560. Its totient is φ = 4072.

The previous prime is 12227. The next prime is 12239. The reversal of 12228 is 82221.

It is a tau number, because it is divible by the number of its divisors (12).

It is a plaindrome in base 10.

It is not an unprimeable number, because it can be changed into a prime (12227) 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, 498 + ... + 521.

It is an arithmetic number, because the mean of its divisors is an integer number (2380).

2¹²²²⁸ is an apocalyptic number.

It is an amenable number.

12228 is an abundant number, since it is smaller than the sum of its proper divisors (16332).

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

It is a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14280).

12228 is a wasteful number, since it uses less digits than its factorization.

12228 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1026 (or 1024 counting only the distinct ones).

The product of its digits is 64, while the sum is 15.

The square root of 12228 is about 110.5802875742. The cubic root of 12228 is about 23.0383732455.

Adding to 12228 its reverse (82221), we get a palindrome (94449).

The spelling of 12228 in words is "twelve thousand, two hundred twenty-eight".