690 in words
690
six hundred and ninety
690 is written six hundred and ninety.
Ways to write it
- As an ordinal
- six hundred and ninetieth
- Roman numeral
- DCXC
- Expanded form
- 600 + 90
Place value
| Place | Digit | Value |
|---|---|---|
| hundreds | 6 | 600 |
| tens | 9 | 90 |
| ones | 0 | 0 |
Number facts
- Even or odd
- Even
- Prime or composite
- Composite
- Factors
- 1, 2, 3, 5, 6, 10, 15, 23, 30, 46, 69, 115, 138, 230, 345 and 690 (16 factors)
- First 10 multiples
- 690, 1,380, 2,070, 2,760, 3,450, 4,140, 4,830, 5,520, 6,210, 6,900
- Square
- 690 × 690 = 476,100
- Square root
- ≈ 26.27
- Sum of the digits
- 6 + 9 + 0 = 15
- Rounded to the nearest 10
- 690
- Rounded to the nearest 100
- 700
- Number before
- 689
- Number after
- 691
- In binary
1010110010
Quick check
What number comes just after 690?
Show the answer
691
Is 690 even or odd?
Show the answer
Even
What is 690 + 10?
Show the answer
700
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 690 in words?
690 is written "six hundred and ninety".
Is 690 a prime number?
No. 690 is a composite number, because it has more than two factors.
What are the factors of 690?
The factors of 690 are 1, 2, 3, 5, 6, 10, 15, 23, 30, 46, 69, 115, 138, 230, 345 and 690.
How do you write 690 in Roman numerals?
690 in Roman numerals is DCXC.