40 in Roman Numerals
40
X (subtracted)L
forty
How XL is formed
| Place | Value | Symbols |
|---|---|---|
| Tens | 40 | X (subtracted)L |
| Total | 40 | XL |
XL is a subtractive pair: X written before L means 50 − 10 = 40.
Common mistakes
Wrong: XXXX
Why isn't 40 written as XXXX?
A symbol can't be repeated four times in a row. 40 is XL (50 − 10), not XXXX.
Where you'll see XL
Super Bowl XL was played on February 5, 2006 at Ford Field in Detroit: the Pittsburgh Steelers beat the Seattle Seahawks 21–10.
The 2024 edition of WrestleMania was billed as WrestleMania XL.
Numbers near 40
Properties of 40
- Prime factors
- 2³ × 5
- Divisors
- 1, 2, 4, 5, 8, 10, 20, 40
- Even or odd
- Even
- Prime number
- No
- Letters in XL
- 2
40,000 in Roman numerals
With a bar over it (vinculum), X̅L̅ means 40 × 1,000 = 40,000. How Roman numerals work