12120728 has 16 divisors (see below), whose sum is σ = 24063480. Its totient is φ = 5703808.

The previous prime is 12120709. The next prime is 12120737. The reversal of 12120728 is 82702121.

12120728 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

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, 44426 + ... + 44697.

Almost surely, 2^12120728 is an apocalyptic number.

It is an amenable number.

12120728 is a deficient number, since it is larger than the sum of its proper divisors (11942752).

12120728 is a wasteful number, since it uses less digits than its factorization.

12120728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 89146 (or 89142 counting only the distinct ones).

The product of its (nonzero) digits is 448, while the sum is 23.

The square root of 12120728 is about 3481.4835918039. The cubic root of 12120728 is about 229.7080605995.

Adding to 12120728 its reverse (82702121), we get a palindrome (94822849).

The spelling of 12120728 in words is "twelve million, one hundred twenty thousand, seven hundred twenty-eight".