3,989 in words
3,989
three thousand nine hundred and eighty-nine
3,989 is written three thousand nine hundred and eighty-nine.
Ways to write it
- As an ordinal
- three thousand nine hundred and eighty-ninth
- Roman numeral
- MMMCMLXXXIX
- Expanded form
- 3,000 + 900 + 80 + 9
Place value
| Place | Digit | Value |
|---|---|---|
| thousands | 3 | 3,000 |
| hundreds | 9 | 900 |
| tens | 8 | 80 |
| ones | 9 | 9 |
Number facts
- Even or odd
- Odd
- Prime or composite
- Prime
- Factors
- 1 and 3,989 (2 factors)
- First 10 multiples
- 3,989, 7,978, 11,967, 15,956, 19,945, 23,934, 27,923, 31,912, 35,901, 39,890
- Square
- 3,989 × 3,989 = 15,912,121
- Square root
- ≈ 63.16
- Sum of the digits
- 3 + 9 + 8 + 9 = 29
- Rounded to the nearest 10
- 3,990
- Rounded to the nearest 100
- 4,000
- Rounded to the nearest 1000
- 4,000
- Number before
- 3,988
- Number after
- 3,990
- In binary
111110010101
Quick check
What number comes just after 3,989?
Show the answer
3,990
Is 3,989 even or odd?
Show the answer
Odd
What is 3,989 + 10?
Show the answer
3,999
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 3,989 in words?
3,989 is written "three thousand nine hundred and eighty-nine".
Is 3,989 a prime number?
Yes. 3,989 is a prime number: its only factors are 1 and 3,989.
What are the factors of 3,989?
The factors of 3,989 are 1 and 3,989.
How do you write 3,989 in Roman numerals?
3,989 in Roman numerals is MMMCMLXXXIX.