12273228 has 48 divisors (see below), whose sum is σ = 34715520. Its totient is φ = 3718800.

The previous prime is 12273223. The next prime is 12273229. The reversal of 12273228 is 82237221.

It is a happy number.

12273228 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (12273223) 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, 3978 + ... + 6353.

It is an arithmetic number, because the mean of its divisors is an integer number (723240).

Almost surely, 2^12273228 is an apocalyptic number.

12273228 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

12273228 is an abundant number, since it is smaller than the sum of its proper divisors (22442292).

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

12273228 is a wasteful number, since it uses less digits than its factorization.

12273228 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10355 (or 10347 counting only the distinct ones).

The product of its digits is 2688, while the sum is 27.

The square root of 12273228 is about 3503.3167142010. The cubic root of 12273228 is about 230.6674249402.

It can be divided in two parts, 122732 and 28, that added together give a triangular number (122760 = T₄₉₅).

The spelling of 12273228 in words is "twelve million, two hundred seventy-three thousand, two hundred twenty-eight".