12826638 has 24 divisors (see below), whose sum is σ = 30317976. Its totient is φ = 3886800.

The previous prime is 12826631. The next prime is 12826643. The reversal of 12826638 is 83662821.

12826638 is a `hidden beast` number, since 12 + 8 + 2 + 6 + 638 = 666.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12826631) 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 11 ways as a sum of consecutive naturals, for example, 32193 + ... + 32588.

It is an arithmetic number, because the mean of its divisors is an integer number (1263249).

Almost surely, 2^12826638 is an apocalyptic number.

12826638 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

12826638 is an abundant number, since it is smaller than the sum of its proper divisors (17491338).

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

12826638 is a wasteful number, since it uses less digits than its factorization.

12826638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64800 (or 64797 counting only the distinct ones).

The product of its digits is 27648, while the sum is 36.

The square root of 12826638 is about 3581.4296028262. The cubic root of 12826638 is about 234.0835774211.

The spelling of 12826638 in words is "twelve million, eight hundred twenty-six thousand, six hundred thirty-eight".