M = 1000 and 2000 is simply MM (1000 + 1000), 7 = VII so 2007 is written as MMVII
It's already a numeric number
4020096 IS in numeric form.
8 in numeric numbers is VIII.
LXXV
Nineteen.
(VIII)
(XXII)
MMMMMMMMMMMMMD
8,400
XCIV
we write 5 in roman number like this :- V
MM