780 in words
780
seven hundred and eighty
780 is written seven hundred and eighty.
Ways to write it
- As an ordinal
- seven hundred and eightieth
- Roman numeral
- DCCLXXX
- Expanded form
- 700 + 80
Place value
| Place | Digit | Value |
|---|---|---|
| hundreds | 7 | 700 |
| tens | 8 | 80 |
| ones | 0 | 0 |
Number facts
- Even or odd
- Even
- Prime or composite
- Composite
- Factors
- 1, 2, 3, 4, 5, 6, 10, 12, 13, 15, 20, 26, 30, 39, 52, 60, 65, 78, 130, 156, 195, 260, 390 and 780 (24 factors)
- First 10 multiples
- 780, 1,560, 2,340, 3,120, 3,900, 4,680, 5,460, 6,240, 7,020, 7,800
- Square
- 780 × 780 = 608,400
- Square root
- ≈ 27.93
- Sum of the digits
- 7 + 8 + 0 = 15
- Rounded to the nearest 10
- 780
- Rounded to the nearest 100
- 800
- Number before
- 779
- Number after
- 781
- In binary
1100001100
Quick check
What number comes just after 780?
Show the answer
781
Is 780 even or odd?
Show the answer
Even
What is 780 + 10?
Show the answer
790
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 780 in words?
780 is written "seven hundred and eighty".
Is 780 a prime number?
No. 780 is a composite number, because it has more than two factors.
What are the factors of 780?
The factors of 780 are 1, 2, 3, 4, 5, 6, 10, 12, 13, 15, 20, 26, 30, 39, 52, 60, 65, 78, 130, 156, 195, 260, 390 and 780.
How do you write 780 in Roman numerals?
780 in Roman numerals is DCCLXXX.