12366638 has 16 divisors (see below), whose sum is σ = 19084896. Its totient is φ = 6007680.

The previous prime is 12366637. The next prime is 12366643. The reversal of 12366638 is 83666321.

It is a junction number, because it is equal to n+sod(n) for n = 12366598 and 12366607.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12366631) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9770 + ... + 10962.

It is an arithmetic number, because the mean of its divisors is an integer number (1192806).

Almost surely, 2^12366638 is an apocalyptic number.

12366638 is a deficient number, since it is larger than the sum of its proper divisors (6718258).

12366638 is a wasteful number, since it uses less digits than its factorization.

12366638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1339.

The product of its digits is 31104, while the sum is 35.

The square root of 12366638 is about 3516.6230960966. The cubic root of 12366638 is about 231.2511401940.

The spelling of 12366638 in words is "twelve million, three hundred sixty-six thousand, six hundred thirty-eight".