Il numero 3999, tremilanovecentonovantanove in Italiano, in Inglese si dice three thousand nine hundred ninety-nine.
Il numero ordinale 3999° in inglese si dice three thousand nine hundred ninety-ninth.
3990: three thousand nine hundred ninety
3991: three thousand nine hundred ninety-one
3992: three thousand nine hundred ninety-two
3993: three thousand nine hundred ninety-three
3994: three thousand nine hundred ninety-four
3995: three thousand nine hundred ninety-five
3996: three thousand nine hundred ninety-six
3997: three thousand nine hundred ninety-seven
3998: three thousand nine hundred ninety-eight
4000: four thousand
4001: four thousand one
4002: four thousand two
4003: four thousand three
4004: four thousand four
4005: four thousand five
4006: four thousand six
4007: four thousand seven
4008: four thousand eight