12820312 has 32 divisors (see below), whose sum is σ = 25719120. Its totient is φ = 5969920.

The previous prime is 12820303. The next prime is 12820337. The reversal of 12820312 is 21302821.

It is a self number, because there is not a number n which added to its sum of digits gives 12820312.

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 7 ways as a sum of consecutive naturals, for example, 14112 + ... + 14992.

Almost surely, 2^12820312 is an apocalyptic number.

It is an amenable number.

12820312 is an abundant number, since it is smaller than the sum of its proper divisors (12898808).

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

12820312 is a wasteful number, since it uses less digits than its factorization.

12820312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1011 (or 1007 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 19.

The square root of 12820312 is about 3580.5463270289. The cubic root of 12820312 is about 234.0450883481.

The spelling of 12820312 in words is "twelve million, eight hundred twenty thousand, three hundred twelve".