12081728 has 28 divisors (see below), whose sum is σ = 24091392. Its totient is φ = 6011520.

The previous prime is 12081703. The next prime is 12081731. The reversal of 12081728 is 82718021.

It is a self number, because there is not a number n which added to its sum of digits gives 12081728.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19601 + ... + 20207.

Almost surely, 2^12081728 is an apocalyptic number.

It is an amenable number.

12081728 is a deficient number, since it is larger than the sum of its proper divisors (12009664).

12081728 is an equidigital number, since it uses as much as digits as its factorization.

12081728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 930 (or 920 counting only the distinct ones).

The product of its (nonzero) digits is 1792, while the sum is 29.

The square root of 12081728 is about 3475.8780185731. The cubic root of 12081728 is about 229.4614241468.

Adding to 12081728 its reverse (82718021), we get a palindrome (94799749).

The spelling of 12081728 in words is "twelve million, eighty-one thousand, seven hundred twenty-eight".