You write it like this:
4,610,000
4 is in the millions place
6 is in the hundred thousands place
1 is in the ten thousands place
"One million six hundred four thousand" 1,604,000
Four million, six hundred five thousand, sixty-four is 4,605,064
six hundred three million and four thousand in number is: 603'004'000
One million, four hundred thirty thousand.
Four million, four hundred fifty thousand.
Five hundred million, four hundred thousand
4,400,400
two million four hundred thousand = 2,400,000
304,020,003
"One million six hundred four thousand" 1,604,000
seventeen million four hundred and fifty thousand is 17,450,000.
One million four hundred fifty thousand.
Four million, six hundred five thousand, sixty-four is 4,605,064
six hundred three million and four thousand in number is: 603'004'000
203,004,404
Seven million, four hundred thousand
Four hundred thousand million. (Ok, in Arabic numerals 400,000,000)