1989是1988与1990之间的自然数。读法读作:中文:一千九百八十九英文:One thousand, nine hundred and eighty-nine写法写作:阿拉伯数字:1989中文数字:(小写)一千九百八十九;(大写)壹仟玖佰捌拾玖英文数字:One thousand, nine hundred and eighty-nine二进制:11111000101八进制:3705十六进制:7C5