12749228 has 24 divisors (see below), whose sum is σ = 23620800. Its totient is φ = 6004368.

The previous prime is 12749197. The next prime is 12749239. The reversal of 12749228 is 82294721.

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, 16883 + ... + 17621.

It is an arithmetic number, because the mean of its divisors is an integer number (984200).

Almost surely, 2^12749228 is an apocalyptic number.

It is an amenable number.

12749228 is a deficient number, since it is larger than the sum of its proper divisors (10871572).

12749228 is a wasteful number, since it uses less digits than its factorization.

12749228 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 989 (or 987 counting only the distinct ones).

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

The square root of 12749228 is about 3570.6061110125. The cubic root of 12749228 is about 233.6117212405.

The spelling of 12749228 in words is "twelve million, seven hundred forty-nine thousand, two hundred twenty-eight".