MMDCCC
Six hundred and fifty thousand in numerals is 650,000
They are: XXVIII = 28
Seven thousand six hundred and four in numerals is 7,604.
The number 28 is written as XXVIII in Roman numerals.
C is 100.
170
500,000,000
Two hundred thousand is 200,000
++ XXVIII
1200 = twelve hundred or one thousand and two hundred
It is 605 in Hindu-Arabic numerals and in Roman numerals it is DCV
203,000