480
Nine hundred and eighty-four.
This is how you write out four million, eight hundred eighty one: 4,000,881
Eighty-one and four hundred eighty-four thousandths in decimal notation is 81.484
280,489,000
Sixty-four million, six hundred eighty-nine thousand, nine hundred eighty-four.
To write it out in words, it's four-thousand nine-hundred eighty, like you wrote. Numerically, it is 4980.
280,000.
0.489 = four hundred eighty nine thousandths.
Three hundred thousand six hundred and eighty
eighty-four hundred-thousandths
Four hundred eighty-five.
One hundred six thousand, seven hundred eighty-four.