12438228 has 24 divisors (see below), whose sum is σ = 31661280. Its totient is φ = 3769120.

The previous prime is 12438227. The next prime is 12438247. The reversal of 12438228 is 82283421.

It is a junction number, because it is equal to n+sod(n) for n = 12438195 and 12438204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12438227) 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, 46983 + ... + 47246.

It is an arithmetic number, because the mean of its divisors is an integer number (1319220).

Almost surely, 2^12438228 is an apocalyptic number.

It is an amenable number.

12438228 is an abundant number, since it is smaller than the sum of its proper divisors (19223052).

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

12438228 is a wasteful number, since it uses less digits than its factorization.

12438228 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 94247 (or 94245 counting only the distinct ones).

The product of its digits is 6144, while the sum is 30.

The square root of 12438228 is about 3526.7872065096. The cubic root of 12438228 is about 231.6965165777.

The spelling of 12438228 in words is "twelve million, four hundred thirty-eight thousand, two hundred twenty-eight".