728 in words
728
seven hundred twenty-eight
728 is written seven hundred twenty-eight.
Ways to write it
- As an ordinal
- seven hundred twenty-eighth
- Roman numeral
- DCCXXVIII
- Expanded form
- 700 + 20 + 8
Place value
| Place | Digit | Value |
|---|---|---|
| hundreds | 7 | 700 |
| tens | 2 | 20 |
| ones | 8 | 8 |
Number facts
- Even or odd
- Even
- Prime or composite
- Composite
- Factors
- 1, 2, 4, 7, 8, 13, 14, 26, 28, 52, 56, 91, 104, 182, 364 and 728 (16 factors)
- First 10 multiples
- 728, 1,456, 2,184, 2,912, 3,640, 4,368, 5,096, 5,824, 6,552, 7,280
- Square
- 728 × 728 = 529,984
- Square root
- ≈ 26.98
- Sum of the digits
- 7 + 2 + 8 = 17
- Rounded to the nearest 10
- 730
- Rounded to the nearest 100
- 700
- Number before
- 727
- Number after
- 729
- In binary
1011011000
Quick check
What number comes just after 728?
Show the answer
729
Is 728 even or odd?
Show the answer
Even
What is 728 + 10?
Show the answer
738
Practice 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 728 in words?
728 is written "seven hundred twenty-eight".
Is 728 a prime number?
No. 728 is a composite number, because it has more than two factors.
What are the factors of 728?
The factors of 728 are 1, 2, 4, 7, 8, 13, 14, 26, 28, 52, 56, 91, 104, 182, 364 and 728.
How do you write 728 in Roman numerals?
728 in Roman numerals is DCCXXVIII.