12820986 has 24 divisors (see below), whose sum is σ = 28196064. Its totient is φ = 4209480.

The previous prime is 12820979. The next prime is 12821021. The reversal of 12820986 is 68902821.

It is a self number, because there is not a number n which added to its sum of digits gives 12820986.

It is a congruent number.

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 4110 + ... + 6521.

It is an arithmetic number, because the mean of its divisors is an integer number (1174836).

Almost surely, 2^12820986 is an apocalyptic number.

12820986 is an abundant number, since it is smaller than the sum of its proper divisors (15375078).

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

12820986 is a wasteful number, since it uses less digits than its factorization.

12820986 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10706 (or 10703 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 36.

The square root of 12820986 is about 3580.6404455069. The cubic root of 12820986 is about 234.0491897466.

The spelling of 12820986 in words is "twelve million, eight hundred twenty thousand, nine hundred eighty-six".