12279228 has 24 divisors (see below), whose sum is σ = 30855888. Its totient is φ = 3778176.

The previous prime is 12279167. The next prime is 12279233. The reversal of 12279228 is 82297221.

It is a congruent number.

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, 39201 + ... + 39512.

It is an arithmetic number, because the mean of its divisors is an integer number (1285662).

Almost surely, 2^12279228 is an apocalyptic number.

It is an amenable number.

12279228 is an abundant number, since it is smaller than the sum of its proper divisors (18576660).

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

12279228 is a wasteful number, since it uses less digits than its factorization.

12279228 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78733 (or 78731 counting only the distinct ones).

The product of its digits is 8064, while the sum is 33.

The square root of 12279228 is about 3504.1729409377. The cubic root of 12279228 is about 230.7050075300.

The spelling of 12279228 in words is "twelve million, two hundred seventy-nine thousand, two hundred twenty-eight".