990 in words
990
nine hundred and ninety
990 is written nine hundred and ninety.
Ways to write it
- As an ordinal
- nine hundred and ninetieth
- Roman numeral
- CMXC
- Expanded form
- 900 + 90
Place value
| Place | Digit | Value |
|---|---|---|
| hundreds | 9 | 900 |
| tens | 9 | 90 |
| ones | 0 | 0 |
Number facts
- Even or odd
- Even
- Prime or composite
- Composite
- Factors
- 1, 2, 3, 5, 6, 9, 10, 11, 15, 18, 22, 30, 33, 45, 55, 66, 90, 99, 110, 165, 198, 330, 495 and 990 (24 factors)
- First 10 multiples
- 990, 1,980, 2,970, 3,960, 4,950, 5,940, 6,930, 7,920, 8,910, 9,900
- Square
- 990 × 990 = 9,80,100
- Square root
- ≈ 31.46
- Sum of the digits
- 9 + 9 + 0 = 18
- Rounded to the nearest 10
- 990
- Rounded to the nearest 100
- 1,000
- Number before
- 989
- Number after
- 991
- In binary
1111011110
Quick check
What number comes just after 990?
Show the answer
991
Is 990 even or odd?
Show the answer
Even
What is 990 + 10?
Show the answer
1,000
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 990 in words?
990 is written "nine hundred and ninety".
Is 990 a prime number?
No. 990 is a composite number, because it has more than two factors.
What are the factors of 990?
The factors of 990 are 1, 2, 3, 5, 6, 9, 10, 11, 15, 18, 22, 30, 33, 45, 55, 66, 90, 99, 110, 165, 198, 330, 495 and 990.
How do you write 990 in Roman numerals?
990 in Roman numerals is CMXC.