12757228 has 12 divisors (see below), whose sum is σ = 24354792. Its totient is φ = 5798720.

The previous prime is 12757219. The next prime is 12757247. The reversal of 12757228 is 82275721.

It is a junction number, because it is equal to n+sod(n) for n = 12757193 and 12757202.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 144925 + ... + 145012.

It is an arithmetic number, because the mean of its divisors is an integer number (2029566).

Almost surely, 2^12757228 is an apocalyptic number.

It is an amenable number.

12757228 is a deficient number, since it is larger than the sum of its proper divisors (11597564).

12757228 is a wasteful number, since it uses less digits than its factorization.

12757228 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 289952 (or 289950 counting only the distinct ones).

The product of its digits is 15680, while the sum is 34.

The square root of 12757228 is about 3571.7261933133. The cubic root of 12757228 is about 233.6605739502.

The spelling of 12757228 in words is "twelve million, seven hundred fifty-seven thousand, two hundred twenty-eight".