406 in words

406 is written "four hundred six". British English inserts "and" before the final part, giving "four hundred and six"; American English leaves it out.

Where each word comes from

The same number, other ways

In words (US)

Four hundred six

In words (UK)

Four hundred and six

Ordinal

406th — four hundred sixth

Roman numeral

CDVI

Digits

406

Writing it on a cheque

On a cheque the amount line reads "Four hundred and six and 00/100" — or "Four hundred and six only" in Indian and much of Commonwealth practice. The fraction or the word "only" exists to stop anyone appending digits after what you wrote. Draw a line through any space left over for the same reason.