If you need the number as a string you can:
:ClrHome
:Disp NUMBER >Dec
:Copy(L5, L1, 5)
:ClrHome
:0 -> {L1 + 5}
That will save the number as a string in L1. It doesn't have to be L1 it can be any string. If the number is less than 5 digits long the string will start with space. So if the number was 354 the string would be " 354". Notice that the string has 2 spaces before the number.
The copy function can be used to take a "screenshot" of the homescreen. Copy(L5, POINTER, AMOUNT) would copy the AMOUNT of characters from the homescreen to POINTER. All the code does is display the number and copies the first 5 characters of the homescreen which happens to be the number that was displayed.