个 1
十 10
百 100
千 1000
万 10000
十万 100000
百万 1000000
千万 10000000
亿 100000000
十亿 1000000000
百亿 10000000000
千亿 100000000000
i think you know the above.50多万 means > 500,000 but < 600,000
actually,50多万 means a little more than 500,000
if much more than 500,000 but a little less than 600,000. we say that 不到60万