They can be: 830 or 30 to the power of 8
3333
0
0
put the numbers in order from greatest to least greatest, 0 3 4 6 7 8
973210
3333
0
0
put the numbers in order from greatest to least greatest, 0 3 4 6 7 8
Least is 03469 Greatest is 96430
974
973210
87,630
Depends what you mean. Greatest number you can make with an expression with just 3's: 3^^^^^^^^^^^^^^^(infinite ^s)^^^^^^^^^^^^3. A similar number to this would be grahams number. It would take BILLIONS of years just to count how many digits graham's number contains!
973 793
3
There is no 4-digit number that is divisible by zero.