12617228 has 12 divisors (see below), whose sum is σ = 23778720. Its totient is φ = 5823312.

The previous prime is 12617221. The next prime is 12617243. The reversal of 12617228 is 82271621.

It is a self number, because there is not a number n which added to its sum of digits gives 12617228.

It is not an unprimeable number, because it can be changed into a prime (12617221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 121268 + ... + 121371.

It is an arithmetic number, because the mean of its divisors is an integer number (1981560).

Almost surely, 2^12617228 is an apocalyptic number.

It is an amenable number.

12617228 is a deficient number, since it is larger than the sum of its proper divisors (11161492).

12617228 is a wasteful number, since it uses less digits than its factorization.

12617228 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 242656 (or 242654 counting only the distinct ones).

The product of its digits is 2688, while the sum is 29.

The square root of 12617228 is about 3552.0737604954. The cubic root of 12617228 is about 232.8026843571.

Adding to 12617228 its reverse (82271621), we get a palindrome (94888849).

The spelling of 12617228 in words is "twelve million, six hundred seventeen thousand, two hundred twenty-eight".