What is the largest number i can make 8 4 9?

Answer 1

The answer depends on what you are permitted to do in order to "make". The largest number that you can make by simply rearranging the three digits is 984. However, (4^8)^9 is of the order 10^43. You could get even larger numbers using factorials.

Answer 2

Using them once each, 984.

If other symbols are allowed (4! to the 8! power) to the 9! power