684 in words
684
six hundred and eighty-four
684 is written six hundred and eighty-four.
Ways to write it
- As an ordinal
- six hundred and eighty-fourth
- Roman numeral
- DCLXXXIV
- Expanded form
- 600 + 80 + 4
Place value
| Place | Digit | Value |
|---|---|---|
| hundreds | 6 | 600 |
| tens | 8 | 80 |
| ones | 4 | 4 |
Number facts
- Even or odd
- Even
- Prime or composite
- Composite
- Factors
- 1, 2, 3, 4, 6, 9, 12, 18, 19, 36, 38, 57, 76, 114, 171, 228, 342 and 684 (18 factors)
- First 10 multiples
- 684, 1,368, 2,052, 2,736, 3,420, 4,104, 4,788, 5,472, 6,156, 6,840
- Square
- 684 × 684 = 4,67,856
- Square root
- ≈ 26.15
- Sum of the digits
- 6 + 8 + 4 = 18
- Rounded to the nearest 10
- 680
- Rounded to the nearest 100
- 700
- Number before
- 683
- Number after
- 685
- In binary
1010101100
Quick check
What number comes just after 684?
Show the answer
685
Is 684 even or odd?
Show the answer
Even
What is 684 + 10?
Show the answer
694
Practise with a game
Factors, Multiples & Primes
Multiples, factors, prime numbers, square numbers and prime factors.
Roman Numerals
Read and write Roman numerals from I to 3,999.Frequently asked questions
How do you write 684 in words?
684 is written "six hundred and eighty-four".
Is 684 a prime number?
No. 684 is a composite number, because it has more than two factors.
What are the factors of 684?
The factors of 684 are 1, 2, 3, 4, 6, 9, 12, 18, 19, 36, 38, 57, 76, 114, 171, 228, 342 and 684.
How do you write 684 in Roman numerals?
684 in Roman numerals is DCLXXXIV.