12272228 has 12 divisors (see below), whose sum is σ = 21502572. Its totient is φ = 6128640.

The previous prime is 12272167. The next prime is 12272231. The reversal of 12272228 is 82227221.

It can be written as a sum of positive squares in 2 ways, for example, as 1236544 + 11035684 = 1112^2 + 3322^2 .

It is a junction number, because it is equal to n+sod(n) for n = 12272197 and 12272206.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3608 + ... + 6128.

It is an arithmetic number, because the mean of its divisors is an integer number (1791881).

Almost surely, 2^12272228 is an apocalyptic number.

It is an amenable number.

12272228 is a deficient number, since it is larger than the sum of its proper divisors (9230344).

12272228 is a wasteful number, since it uses less digits than its factorization.

12272228 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3742 (or 3740 counting only the distinct ones).

The product of its digits is 1792, while the sum is 26.

The square root of 12272228 is about 3503.1739893988. The cubic root of 12272228 is about 230.6611599845.

Adding to 12272228 its reverse (82227221), we get a palindrome (94499449).

The spelling of 12272228 in words is "twelve million, two hundred seventy-two thousand, two hundred twenty-eight".