12638423 has 12 divisors (see below), whose sum is σ = 15101352. Its totient is φ = 10538640.

The previous prime is 12638419. The next prime is 12638453. The reversal of 12638423 is 32483621.

12638423 is digitally balanced in base 2 and base 8, because in such bases it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 12638423 - 2² = 12638419 is a prime.

12638423 is strictly pandigital in base 8.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12638413) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1673 + ... + 5298.

It is an arithmetic number, because the mean of its divisors is an integer number (1258446).

Almost surely, 2^12638423 is an apocalyptic number.

12638423 is a deficient number, since it is larger than the sum of its proper divisors (2462929).

12638423 is an equidigital number, since it uses as much as digits as its factorization.

12638423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7022 (or 7015 counting only the distinct ones).

The product of its digits is 6912, while the sum is 29.

The square root of 12638423 is about 3555.0559770558. The cubic root of 12638423 is about 232.9329689844.

The spelling of 12638423 in words is "twelve million, six hundred thirty-eight thousand, four hundred twenty-three".