Il numero 840, ottocentoquaranta in Italiano, in Inglese si dice eight hundred forty.
Il numero ordinale 840° in inglese si dice eight hundred fortieth.
831: eight hundred thirty-one
832: eight hundred thirty-two
833: eight hundred thirty-three
834: eight hundred thirty-four
835: eight hundred thirty-five
836: eight hundred thirty-six
837: eight hundred thirty-seven
838: eight hundred thirty-eight
839: eight hundred thirty-nine
841: eight hundred forty-one
842: eight hundred forty-two
843: eight hundred forty-three
844: eight hundred forty-four
845: eight hundred forty-five
846: eight hundred forty-six
847: eight hundred forty-seven
848: eight hundred forty-eight
849: eight hundred forty-nine