Wow, you just spelled it out. But if you meant in numbers it would be 600,004.
Four hundred thousand, six hundred
186,400
Seven thousand six hundred and four in numerals is 7,604.
400,624
"One million six hundred four thousand" 1,604,000
Four thousand, six hundred.
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
400,600 = four hundred thousand, six hundred.
four hundred thousand, six hundred.
6406004
Twelve thousand, four hundred six.