12728168 has 8 divisors (see below), whose sum is σ = 23865330. Its totient is φ = 6364080.

The previous prime is 12728167. The next prime is 12728179. The reversal of 12728168 is 86182721.

It can be written as a sum of positive squares in only one way, i.e., 6666724 + 6061444 = 2582^2 + 2462^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is not an unprimeable number, because it can be changed into a prime (12728167) by changing a digit.

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 as a sum of consecutive naturals, namely, 795503 + ... + 795518.

Almost surely, 2^12728168 is an apocalyptic number.

It is an amenable number.

12728168 is a deficient number, since it is larger than the sum of its proper divisors (11137162).

12728168 is a wasteful number, since it uses less digits than its factorization.

12728168 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1591027 (or 1591023 counting only the distinct ones).

The product of its digits is 10752, while the sum is 35.

The square root of 12728168 is about 3567.6558129954. The cubic root of 12728168 is about 233.4830186942.

The spelling of 12728168 in words is "twelve million, seven hundred twenty-eight thousand, one hundred sixty-eight".