12218028 has 24 divisors (see below), whose sum is σ = 28773360. Its totient is φ = 4034880.

The previous prime is 12218027. The next prime is 12218033. The reversal of 12218028 is 82081221.

It is a junction number, because it is equal to n+sod(n) for n = 12217989 and 12218007.

It is not an unprimeable number, because it can be changed into a prime (12218027) 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, 3363 + ... + 5978.

It is an arithmetic number, because the mean of its divisors is an integer number (1198890).

Almost surely, 2^12218028 is an apocalyptic number.

It is an amenable number.

12218028 is an abundant number, since it is smaller than the sum of its proper divisors (16555332).

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

12218028 is a wasteful number, since it uses less digits than its factorization.

12218028 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9457 (or 9455 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 24.

The square root of 12218028 is about 3495.4295873326. The cubic root of 12218028 is about 230.3210890306.

Adding to 12218028 its reverse (82081221), we get a palindrome (94299249).

The spelling of 12218028 in words is "twelve million, two hundred eighteen thousand, twenty-eight".