12806538 has 16 divisors (see below), whose sum is σ = 26726976. Its totient is φ = 4083200.

The previous prime is 12806533. The next prime is 12806557. The reversal of 12806538 is 83560821.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 12806499 and 12806508.

It is not an unprimeable number, because it can be changed into a prime (12806531) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 46263 + ... + 46538.

It is an arithmetic number, because the mean of its divisors is an integer number (1670436).

Almost surely, 2^12806538 is an apocalyptic number.

12806538 is an abundant number, since it is smaller than the sum of its proper divisors (13920438).

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

12806538 is a wasteful number, since it uses less digits than its factorization.

12806538 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 92829.

The product of its (nonzero) digits is 11520, while the sum is 33.

The square root of 12806538 is about 3578.6223606299. The cubic root of 12806538 is about 233.9612398362.

The spelling of 12806538 in words is "twelve million, eight hundred six thousand, five hundred thirty-eight".