12386638 has 16 divisors (see below), whose sum is σ = 20818224. Its totient is φ = 5477760.

The previous prime is 12386611. The next prime is 12386657. The reversal of 12386638 is 83668321.

It is a Harshad number since it is a multiple of its sum of digits (37).

It is a junction number, because it is equal to n+sod(n) for n = 12386597 and 12386606.

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, 6795 + ... + 8422.

It is an arithmetic number, because the mean of its divisors is an integer number (1301139).

Almost surely, 2^12386638 is an apocalyptic number.

12386638 is a deficient number, since it is larger than the sum of its proper divisors (8431586).

12386638 is a wasteful number, since it uses less digits than its factorization.

12386638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15267.

The product of its digits is 41472, while the sum is 37.

The square root of 12386638 is about 3519.4655844318. The cubic root of 12386638 is about 231.3757370263.

It can be divided in two parts, 123866 and 38, that added together give a square (123904 = 352²).

The spelling of 12386638 in words is "twelve million, three hundred eighty-six thousand, six hundred thirty-eight".