40 in words
British English
forty
Forty has no u, although four and fourteen both keep theirs.
Quick reference
- In figures
- 40
- British English
- forty
- American English
- The same (why they differ)
- Ordinal
- fortieth (40th)
- Roman numeral
- XL
- Place value
- 4 in the tens column
- Expanded form
- 40
- Standard form
- 4 × 10¹
- Even or odd
- Even
- Prime factors
- 2³ × 5
Convert any other number, up to thirty-six digits.