12638318 has 16 divisors (see below), whose sum is σ = 23635584. Its totient is φ = 4923960.

The previous prime is 12638309. The next prime is 12638333. The reversal of 12638318 is 81383621.

It is a happy 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 in 7 ways as a sum of consecutive naturals, for example, 40880 + ... + 41187.

It is an arithmetic number, because the mean of its divisors is an integer number (1477224).

Almost surely, 2^12638318 is an apocalyptic number.

12638318 is a deficient number, since it is larger than the sum of its proper divisors (10997266).

12638318 is a wasteful number, since it uses less digits than its factorization.

12638318 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 82087.

The product of its digits is 6912, while the sum is 32.

The square root of 12638318 is about 3555.0412093251. The cubic root of 12638318 is about 232.9323239137.

The spelling of 12638318 in words is "twelve million, six hundred thirty-eight thousand, three hundred eighteen".