390 in words
390
three hundred and ninety
390 is written three hundred and ninety.
Ways to write it
- As an ordinal
- three hundred and ninetieth
- Roman numeral
- CCCXC
- Expanded form
- 300 + 90
Place value
| Place | Digit | Value |
|---|---|---|
| hundreds | 3 | 300 |
| tens | 9 | 90 |
| ones | 0 | 0 |
Number facts
- Even or odd
- Even
- Prime or composite
- Composite
- Factors
- 1, 2, 3, 5, 6, 10, 13, 15, 26, 30, 39, 65, 78, 130, 195 and 390 (16 factors)
- First 10 multiples
- 390, 780, 1,170, 1,560, 1,950, 2,340, 2,730, 3,120, 3,510, 3,900
- Square
- 390 × 390 = 152,100
- Square root
- ≈ 19.75
- Sum of the digits
- 3 + 9 + 0 = 12
- Rounded to the nearest 10
- 390
- Rounded to the nearest 100
- 400
- Number before
- 389
- Number after
- 391
- In binary
110000110
Quick check
What number comes just after 390?
Show the answer
391
Is 390 even or odd?
Show the answer
Even
What is 390 + 10?
Show the answer
400
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 390 in words?
390 is written "three hundred and ninety".
Is 390 a prime number?
No. 390 is a composite number, because it has more than two factors.
What are the factors of 390?
The factors of 390 are 1, 2, 3, 5, 6, 10, 13, 15, 26, 30, 39, 65, 78, 130, 195 and 390.
How do you write 390 in Roman numerals?
390 in Roman numerals is CCCXC.