1804 in Roman Numerals
1804
MDCCCI (subtracted)V
one thousand eight hundred four
How MDCCCIV is formed
| Place | Value | Symbols |
|---|---|---|
| Thousands | 1000 | M |
| Hundreds | 800 | DCCC |
| Units | 4 | I (subtracted)V |
| Total | 1804 | MDCCCIV |
MDCCCIV is written one place at a time, from the largest to the smallest: M (1000) + DCCC (800) + IV (4) = 1804.
IV is the only subtraction: the I before the V takes away 1, so IV = 4.
Common mistakes
Wrong: MDCCCIIII
Why isn't 1804 written as MDCCCIIII?
A symbol can't be repeated four times in a row. 4 is IV (5 − 1), not IIII, so 1804 is MDCCCIV.
Wrong: MCCMIV
Why isn't 1804 written as MCCMIV?
Only one smaller symbol can stand before a larger one, so CCM doesn't work. 800 is DCCC (500 + 300), so 1804 is MDCCCIV.
Numbers near 1804
Properties of 1804
- Prime factors
- 2² × 11 × 41
- Divisors
- 1, 2, 4, 11, 22, 41, 44, 82, 164, 451, 902, 1804
- Even or odd
- Even
- Prime number
- No
- Letters in MDCCCIV
- 7
1,804,000 in Roman numerals
With a bar over it (vinculum), M̅D̅C̅C̅C̅I̅V̅ means 1804 × 1,000 = 1,804,000. How Roman numerals work