12947228 has 12 divisors (see below), whose sum is σ = 25894512. Its totient is φ = 5548800.

The previous prime is 12947213. The next prime is 12947237. The reversal of 12947228 is 82274921.

12947228 = 1357² + 1358² + ... + 1363².

12947228 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

12947228 is an admirable number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 231173 + ... + 231228.

It is an arithmetic number, because the mean of its divisors is an integer number (2157876).

Almost surely, 2^12947228 is an apocalyptic number.

It is an amenable number.

12947228 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

12947228 is a wasteful number, since it uses less digits than its factorization.

12947228 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 462412 (or 462410 counting only the distinct ones).

The product of its digits is 16128, while the sum is 35.

The square root of 12947228 is about 3598.2256738565. The cubic root of 12947228 is about 234.8148715509.

It can be divided in two parts, 129472 and 28, that multiplied together give a square (3625216 = 1904²).

The spelling of 12947228 in words is "twelve million, nine hundred forty-seven thousand, two hundred twenty-eight".