12278866 has 8 divisors (see below), whose sum is σ = 18451440. Its totient is φ = 6128388.

The previous prime is 12278837. The next prime is 12278869. The reversal of 12278866 is 66887221.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (12278869) 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, 4056 + ... + 6403.

It is an arithmetic number, because the mean of its divisors is an integer number (2306430).

Almost surely, 2^12278866 is an apocalyptic number.

12278866 is a deficient number, since it is larger than the sum of its proper divisors (6172574).

12278866 is a wasteful number, since it uses less digits than its factorization.

12278866 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11048.

The product of its digits is 64512, while the sum is 40.

The square root of 12278866 is about 3504.1212878552. The cubic root of 12278866 is about 230.7027403942.

The spelling of 12278866 in words is "twelve million, two hundred seventy-eight thousand, eight hundred sixty-six".