84 in words
84
eighty-four
84 is written eighty-four.
Ways to write it
- As an ordinal
- eighty-fourth
- Roman numeral
- LXXXIV
- Expanded form
- 80 + 4
Place value
| Place | Digit | Value |
|---|---|---|
| tens | 8 | 80 |
| ones | 4 | 4 |
Number facts
- Even or odd
- Even
- Prime or composite
- Composite
- Factors
- 1, 2, 3, 4, 6, 7, 12, 14, 21, 28, 42 and 84 (12 factors)
- First 10 multiples
- 84, 168, 252, 336, 420, 504, 588, 672, 756, 840
- Square
- 84 × 84 = 7,056
- Square root
- ≈ 9.17
- Sum of the digits
- 8 + 4 = 12
- Rounded to the nearest 10
- 80
- Number before
- 83
- Number after
- 85
- In binary
1010100
Quick check
What number comes just after 84?
Show the answer
85
Is 84 even or odd?
Show the answer
Even
What is 84 + 10?
Show the answer
94
Practise with a game
Place Value Quest
Ones, tens, hundreds and thousands.
Times Tables Challenge
Practise any times table from 2× to 12×.Frequently asked questions
How do you write 84 in words?
84 is written "eighty-four".
Is 84 a prime number?
No. 84 is a composite number, because it has more than two factors.
What are the factors of 84?
The factors of 84 are 1, 2, 3, 4, 6, 7, 12, 14, 21, 28, 42 and 84.
How do you write 84 in Roman numerals?
84 in Roman numerals is LXXXIV.