12782286 has 56 divisors (see below), whose sum is σ = 31399704. Its totient is φ = 3868560.

The previous prime is 12782267. The next prime is 12782303. The reversal of 12782286 is 68228721.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 12782286.

It is a congruent number.

It is an unprimeable number.

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 27 ways as a sum of consecutive naturals, for example, 15640 + ... + 16436.

It is an arithmetic number, because the mean of its divisors is an integer number (560709).

Almost surely, 2^12782286 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12782286, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15699852).

12782286 is an abundant number, since it is smaller than the sum of its proper divisors (18617418).

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

12782286 is an equidigital number, since it uses as much as digits as its factorization.

12782286 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 828 (or 813 counting only the distinct ones).

The product of its digits is 21504, while the sum is 36.

The square root of 12782286 is about 3575.2323001450. The cubic root of 12782286 is about 233.8134608024.

The spelling of 12782286 in words is "twelve million, seven hundred eighty-two thousand, two hundred eighty-six".