12638386 has 16 divisors (see below), whose sum is σ = 19580184. Its totient is φ = 6113664.

The previous prime is 12638383. The next prime is 12638389. The reversal of 12638386 is 68383621.

It is an interprime number because it is at equal distance from previous prime (12638383) and next prime (12638389).

It can be written as a sum of positive squares in 4 ways, for example, as 12638025 + 361 = 3555^2 + 19^2 .

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

It is not an unprimeable number, because it can be changed into a prime (12638383) 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, 16876 + ... + 17608.

Almost surely, 2^12638386 is an apocalyptic number.

12638386 is a deficient number, since it is larger than the sum of its proper divisors (6941798).

12638386 is a wasteful number, since it uses less digits than its factorization.

12638386 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1005.

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

The square root of 12638386 is about 3555.0507731958. The cubic root of 12638386 is about 232.9327416742.

The spelling of 12638386 in words is "twelve million, six hundred thirty-eight thousand, three hundred eighty-six".