Subtracting from 12438 its product of digits (192), we obtain a triangular number (12246 = T156).
Adding to 12438 its reverse (83421), we get a palindrome (95859).
It is a happy number.
It is an Ulam number.
It is a Curzon number.
It is a self number, because there is not a number n which added to its sum of digits gives 12438.
It is a congruent number.
212438 is an apocalyptic number.
12438 is a gapful number since it is divisible by the number (18) formed by its first and last digit.
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
12438 is a wasteful number, since it uses less digits than its factorization.
12438 is an evil number, because the sum of its binary digits is even.
The square root of 12438 is about 111.5257817726. The cubic root of 12438 is about 23.1695100858.
The spelling of 12438 in words is "twelve thousand, four hundred thirty-eight".