12045728 has 24 divisors (see below), whose sum is σ = 23806692. Its totient is φ = 5999616.

The previous prime is 12045727. The next prime is 12045743. The reversal of 12045728 is 82754021.

It can be written as a sum of positive squares in 2 ways, for example, as 10163344 + 1882384 = 3188^2 + 1372^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 12045728.

It is not an unprimeable number, because it can be changed into a prime (12045727) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10226 + ... + 11342.

Almost surely, 2^12045728 is an apocalyptic number.

It is an amenable number.

12045728 is a deficient number, since it is larger than the sum of its proper divisors (11760964).

12045728 is a wasteful number, since it uses less digits than its factorization.

12045728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1464 (or 1456 counting only the distinct ones).

The product of its (nonzero) digits is 4480, while the sum is 29.

The square root of 12045728 is about 3470.6956075116. The cubic root of 12045728 is about 229.2332881933.

Adding to 12045728 its reverse (82754021), we get a palindrome (94799749).

The spelling of 12045728 in words is "twelve million, forty-five thousand, seven hundred twenty-eight".