12656228 has 48 divisors (see below), whose sum is σ = 25683840. Its totient is φ = 5405184.

The previous prime is 12656227. The next prime is 12656239. The reversal of 12656228 is 82265621.

It is a junction number, because it is equal to n+sod(n) for n = 12656194 and 12656203.

It is not an unprimeable number, because it can be changed into a prime (12656221) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 90983 + ... + 91121.

It is an arithmetic number, because the mean of its divisors is an integer number (535080).

Almost surely, 2^12656228 is an apocalyptic number.

It is an amenable number.

12656228 is an abundant number, since it is smaller than the sum of its proper divisors (13027612).

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

12656228 is a wasteful number, since it uses less digits than its factorization.

12656228 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 276 (or 274 counting only the distinct ones).

The product of its digits is 11520, while the sum is 32.

The square root of 12656228 is about 3557.5592756833. The cubic root of 12656228 is about 233.0423029161.

The spelling of 12656228 in words is "twelve million, six hundred fifty-six thousand, two hundred twenty-eight".