12662728 has 32 divisors (see below), whose sum is σ = 25716600. Its totient is φ = 5810688.

The previous prime is 12662723. The next prime is 12662731. The reversal of 12662728 is 82726621.

It can be written as a sum of positive squares in 4 ways, for example, as 2815684 + 9847044 = 1678^2 + 3138^2 .

It is a junction number, because it is equal to n+sod(n) for n = 12662693 and 12662702.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12662723) 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 in 7 ways as a sum of consecutive naturals, for example, 32358 + ... + 32746.

Almost surely, 2^12662728 is an apocalyptic number.

It is an amenable number.

12662728 is an abundant number, since it is smaller than the sum of its proper divisors (13053872).

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

12662728 is a wasteful number, since it uses less digits than its factorization.

12662728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 721 (or 717 counting only the distinct ones).

The product of its digits is 16128, while the sum is 34.

The square root of 12662728 is about 3558.4727060918. The cubic root of 12662728 is about 233.0821914654.

The spelling of 12662728 in words is "twelve million, six hundred sixty-two thousand, seven hundred twenty-eight".