688 in words
688
six hundred eighty-eight
688 is written six hundred eighty-eight.
Ways to write it
- As an ordinal
- six hundred eighty-eighth
- Roman numeral
- DCLXXXVIII
- Expanded form
- 600 + 80 + 8
Place value
| Place | Digit | Value |
|---|---|---|
| hundreds | 6 | 600 |
| tens | 8 | 80 |
| ones | 8 | 8 |
Number facts
- Even or odd
- Even
- Prime or composite
- Composite
- Factors
- 1, 2, 4, 8, 16, 43, 86, 172, 344 and 688 (10 factors)
- First 10 multiples
- 688, 1,376, 2,064, 2,752, 3,440, 4,128, 4,816, 5,504, 6,192, 6,880
- Square
- 688 × 688 = 473,344
- Square root
- ≈ 26.23
- Sum of the digits
- 6 + 8 + 8 = 22
- Rounded to the nearest 10
- 690
- Rounded to the nearest 100
- 700
- Number before
- 687
- Number after
- 689
- In binary
1010110000
Quick check
What number comes just after 688?
Show the answer
689
Is 688 even or odd?
Show the answer
Even
What is 688 + 10?
Show the answer
698
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 688 in words?
688 is written "six hundred eighty-eight".
Is 688 a prime number?
No. 688 is a composite number, because it has more than two factors.
What are the factors of 688?
The factors of 688 are 1, 2, 4, 8, 16, 43, 86, 172, 344 and 688.
How do you write 688 in Roman numerals?
688 in Roman numerals is DCLXXXVIII.