12286978 has 8 divisors (see below), whose sum is σ = 20106000. Its totient is φ = 5584980.

The previous prime is 12286969. The next prime is 12286999. The reversal of 12286978 is 87968221.

12286978 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

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, 279228 + ... + 279271.

It is an arithmetic number, because the mean of its divisors is an integer number (2513250).

Almost surely, 2^12286978 is an apocalyptic number.

12286978 is a deficient number, since it is larger than the sum of its proper divisors (7819022).

12286978 is a wasteful number, since it uses less digits than its factorization.

12286978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 558512.

The product of its digits is 96768, while the sum is 43.

The square root of 12286978 is about 3505.2785909254. The cubic root of 12286978 is about 230.7535335933.

The spelling of 12286978 in words is "twelve million, two hundred eighty-six thousand, nine hundred seventy-eight".