12287978 has 8 divisors (see below), whose sum is σ = 18447780. Its totient is φ = 6138720.

The previous prime is 12287939. The next prime is 12287983. The reversal of 12287978 is 87978221.

It can be written as a sum of positive squares in 2 ways, for example, as 8219689 + 4068289 = 2867^2 + 2017^2 .

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, 1718 + ... + 5246.

Almost surely, 2^12287978 is an apocalyptic number.

12287978 is a deficient number, since it is larger than the sum of its proper divisors (6159802).

12287978 is a wasteful number, since it uses less digits than its factorization.

12287978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5272.

The product of its digits is 112896, while the sum is 44.

The square root of 12287978 is about 3505.4212300378. The cubic root of 12287978 is about 230.7597935343.

The spelling of 12287978 in words is "twelve million, two hundred eighty-seven thousand, nine hundred seventy-eight".