12638326 has 4 divisors (see below), whose sum is σ = 18957492. Its totient is φ = 6319162.

The previous prime is 12638309. The next prime is 12638333. The reversal of 12638326 is 62383621.

It is a semiprime because it is the product of two primes.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 3159580 + ... + 3159583.

It is an arithmetic number, because the mean of its divisors is an integer number (4739373).

Almost surely, 2^12638326 is an apocalyptic number.

12638326 is a deficient number, since it is larger than the sum of its proper divisors (6319166).

12638326 is an equidigital number, since it uses as much as digits as its factorization.

12638326 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6319165.

The product of its digits is 10368, while the sum is 31.

The square root of 12638326 is about 3555.0423344877. The cubic root of 12638326 is about 232.9323730621.

The spelling of 12638326 in words is "twelve million, six hundred thirty-eight thousand, three hundred twenty-six".