12671728 has 20 divisors (see below), whose sum is σ = 24616728. Its totient is φ = 6319040.

The previous prime is 12671719. The next prime is 12671741. The reversal of 12671728 is 82717621.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 12671693 and 12671702.

It is a congruent number.

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, 7050 + ... + 8662.

Almost surely, 2^12671728 is an apocalyptic number.

It is an amenable number.

12671728 is a deficient number, since it is larger than the sum of its proper divisors (11945000).

12671728 is a wasteful number, since it uses less digits than its factorization.

12671728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2112 (or 2106 counting only the distinct ones).

The product of its digits is 9408, while the sum is 34.

The square root of 12671728 is about 3559.7370689420. The cubic root of 12671728 is about 233.1373992356.

The spelling of 12671728 in words is "twelve million, six hundred seventy-one thousand, seven hundred twenty-eight".