It is a self number, because there is not a number n which added to its sum of digits gives 138996.
It is a congruent number.
It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 138996.
It is an unprimeable number.
138996 is an untouchable number, because it is not equal to the sum of proper divisors of any number.
2138996 is an apocalyptic number.
It is an amenable number.
It is a practical number, because each smaller number is the sum of distinct divisors of 138996, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (214032).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
138996 is a wasteful number, since it uses less digits than its factorization.
138996 is an evil number, because the sum of its binary digits is even.
The square root of 138996 is about 372.8216731897. The cubic root of 138996 is about 51.8005177768.
The spelling of 138996 in words is "one hundred thirty-eight thousand, nine hundred ninety-six".