12166728 has 32 divisors (see below), whose sum is σ = 34762560. Its totient is φ = 3476160.

The previous prime is 12166703. The next prime is 12166729. The reversal of 12166728 is 82766121.

It is a nude number because it is divisible by every one of its digits.

It is not an unprimeable number, because it can be changed into a prime (12166729) 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, 36043 + ... + 36378.

It is an arithmetic number, because the mean of its divisors is an integer number (1086330).

Almost surely, 2^12166728 is an apocalyptic number.

It is an amenable number.

12166728 is an abundant number, since it is smaller than the sum of its proper divisors (22595832).

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

12166728 is a wasteful number, since it uses less digits than its factorization.

12166728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72437 (or 72433 counting only the distinct ones).

The product of its digits is 8064, while the sum is 33.

The square root of 12166728 is about 3488.0837145917. The cubic root of 12166728 is about 229.9982860616.

The spelling of 12166728 in words is "twelve million, one hundred sixty-six thousand, seven hundred twenty-eight".