12528228 has 12 divisors (see below), whose sum is σ = 29232560. Its totient is φ = 4176072.

The previous prime is 12528227. The next prime is 12528233. The reversal of 12528228 is 82282521.

It is a tau number, because it is divible by the number of its divisors (12).

It is a junction number, because it is equal to n+sod(n) for n = 12528195 and 12528204.

It is not an unprimeable number, because it can be changed into a prime (12528227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 521998 + ... + 522021.

Almost surely, 2^12528228 is an apocalyptic number.

It is an amenable number.

12528228 is an abundant number, since it is smaller than the sum of its proper divisors (16704332).

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

12528228 is a wasteful number, since it uses less digits than its factorization.

12528228 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1044026 (or 1044024 counting only the distinct ones).

The product of its digits is 5120, while the sum is 30.

The square root of 12528228 is about 3539.5236967705. The cubic root of 12528228 is about 232.2540073689.

The spelling of 12528228 in words is "twelve million, five hundred twenty-eight thousand, two hundred twenty-eight".