438 in Roman Numerals
438
C (subtracted)DXXXVIII
four hundred thirty-eight
How CDXXXVIII is formed
| Place | Value | Symbols |
|---|---|---|
| Hundreds | 400 | C (subtracted)D |
| Tens | 30 | XXX |
| Units | 8 | VIII |
| Total | 438 | CDXXXVIII |
CDXXXVIII is written one place at a time, from the largest to the smallest: CD (400) + XXX (30) + VIII (8) = 438.
CD is the only subtraction: the C before the D takes away 100, so CD = 400.
Common mistakes
Wrong: CCCCXXXVIII
Why isn't 438 written as CCCCXXXVIII?
A symbol can't be repeated four times in a row. 400 is CD (500 − 100), not CCCC, so 438 is CDXXXVIII.
Wrong: CDXXXIIX
Why isn't 438 written as CDXXXIIX?
Only one smaller symbol can stand before a larger one, so IIX doesn't work. 8 is VIII (5 + 3), so 438 is CDXXXVIII.
Numbers near 438
Properties of 438
- Prime factors
- 2 × 3 × 73
- Divisors
- 1, 2, 3, 6, 73, 146, 219, 438
- Even or odd
- Even
- Prime number
- No
- Letters in CDXXXVIII
- 9
438,000 in Roman numerals
With a bar over it (vinculum), C̅D̅X̅X̅X̅V̅I̅I̅I̅ means 438 × 1,000 = 438,000. How Roman numerals work