12653728 has 12 divisors (see below), whose sum is σ = 24912090. Its totient is φ = 6326848.

The previous prime is 12653723. The next prime is 12653737. The reversal of 12653728 is 82735621.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 10942864 + 1710864 = 3308^2 + 1308^2 .

It is a hoax number, since the sum of its digits (34) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 12653693 and 12653702.

It is not an unprimeable number, because it can be changed into a prime (12653723) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 197683 + ... + 197746.

Almost surely, 2^12653728 is an apocalyptic number.

It is an amenable number.

12653728 is a deficient number, since it is larger than the sum of its proper divisors (12258362).

12653728 is an equidigital number, since it uses as much as digits as its factorization.

12653728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 395439 (or 395431 counting only the distinct ones).

The product of its digits is 20160, while the sum is 34.

The square root of 12653728 is about 3557.2078938403. The cubic root of 12653728 is about 233.0269575298.

The spelling of 12653728 in words is "twelve million, six hundred fifty-three thousand, seven hundred twenty-eight".