84 in Roman Numerals
84
LXXXI (subtracted)V
eighty-four
How LXXXIV is formed
| Place | Value | Symbols |
|---|---|---|
| Tens | 80 | LXXX |
| Units | 4 | I (subtracted)V |
| Total | 84 | LXXXIV |
LXXXIV is written one place at a time, from the largest to the smallest: LXXX (80) + IV (4) = 84.
IV is the only subtraction: the I before the V takes away 1, so IV = 4.
Common mistakes
Wrong: LXXXIIII
Why isn't 84 written as LXXXIIII?
A symbol can't be repeated four times in a row. 4 is IV (5 − 1), not IIII, so 84 is LXXXIV.
Wrong: XXCIV
Why isn't 84 written as XXCIV?
Only one smaller symbol can stand before a larger one, so XXC doesn't work. 80 is LXXX (50 + 30), so 84 is LXXXIV.
Numbers near 84
Properties of 84
- Prime factors
- 2² × 3 × 7
- Divisors
- 1, 2, 3, 4, 6, 7, 12, 14, 21, 28, 42, 84
- Even or odd
- Even
- Prime number
- No
- Letters in LXXXIV
- 6
84,000 in Roman numerals
With a bar over it (vinculum), L̅X̅X̅X̅I̅V̅ means 84 × 1,000 = 84,000. How Roman numerals work