320 in words
320
three hundred twenty
320 is written three hundred twenty.
Ways to write it
- As an ordinal
- three hundred twentieth
- Roman numeral
- CCCXX
- Expanded form
- 300 + 20
Place value
| Place | Digit | Value |
|---|---|---|
| hundreds | 3 | 300 |
| tens | 2 | 20 |
| ones | 0 | 0 |
Number facts
- Even or odd
- Even
- Prime or composite
- Composite
- Factors
- 1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 160 and 320 (14 factors)
- First 10 multiples
- 320, 640, 960, 1,280, 1,600, 1,920, 2,240, 2,560, 2,880, 3,200
- Square
- 320 × 320 = 102,400
- Square root
- ≈ 17.89
- Sum of the digits
- 3 + 2 + 0 = 5
- Rounded to the nearest 10
- 320
- Rounded to the nearest 100
- 300
- Number before
- 319
- Number after
- 321
- In binary
101000000
Quick check
What number comes just after 320?
Show the answer
321
Is 320 even or odd?
Show the answer
Even
What is 320 + 10?
Show the answer
330
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 320 in words?
320 is written "three hundred twenty".
Is 320 a prime number?
No. 320 is a composite number, because it has more than two factors.
What are the factors of 320?
The factors of 320 are 1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 160 and 320.
How do you write 320 in Roman numerals?
320 in Roman numerals is CCCXX.