12564228 has 24 divisors (see below), whose sum is σ = 29941632. Its totient is φ = 4098784.

The previous prime is 12564193. The next prime is 12564247. The reversal of 12564228 is 82246521.

It is a junction number, because it is equal to n+sod(n) for n = 12564195 and 12564204.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10575 + ... + 11702.

It is an arithmetic number, because the mean of its divisors is an integer number (1247568).

Almost surely, 2^12564228 is an apocalyptic number.

It is an amenable number.

12564228 is an abundant number, since it is smaller than the sum of its proper divisors (17377404).

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

12564228 is a wasteful number, since it uses less digits than its factorization.

12564228 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22331 (or 22329 counting only the distinct ones).

The product of its digits is 7680, while the sum is 30.

The square root of 12564228 is about 3544.6054787522. The cubic root of 12564228 is about 232.4762561023.

The spelling of 12564228 in words is "twelve million, five hundred sixty-four thousand, two hundred twenty-eight".