12813786 has 12 divisors (see below), whose sum is σ = 27763242. Its totient is φ = 4271256.

The previous prime is 12813761. The next prime is 12813791. The reversal of 12813786 is 68731821.

12813786 is a `hidden beast` number, since 1 + 281 + 378 + 6 = 666.

12813786 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 8590761 + 4223025 = 2931^2 + 2055^2 .

It is a super-2 number, since 2×12813786² = 328386223307592, which contains 22 as substring.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 12813786.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 355921 + ... + 355956.

Almost surely, 2^12813786 is an apocalyptic number.

12813786 is an abundant number, since it is smaller than the sum of its proper divisors (14949456).

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

12813786 is a wasteful number, since it uses less digits than its factorization.

12813786 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 711885 (or 711882 counting only the distinct ones).

The product of its digits is 16128, while the sum is 36.

The square root of 12813786 is about 3579.6348975838. The cubic root of 12813786 is about 234.0053691514.

The spelling of 12813786 in words is "twelve million, eight hundred thirteen thousand, seven hundred eighty-six".