321,840 in words
321,840
three hundred twenty-one thousand eight hundred forty
321,840 is written three hundred twenty-one thousand eight hundred forty.
Ways to write it
- As an ordinal
- three hundred twenty-one thousand eight hundred fortieth
- Expanded form
- 300,000 + 20,000 + 1,000 + 800 + 40
Place value
| Place | Digit | Value |
|---|---|---|
| hundred thousands | 3 | 300,000 |
| ten thousands | 2 | 20,000 |
| thousands | 1 | 1,000 |
| hundreds | 8 | 800 |
| tens | 4 | 40 |
| ones | 0 | 0 |
Number facts
- Even or odd
- Even
- Prime or composite
- Composite
- Factors
- 80 factors: too many to list
- First 10 multiples
- 321,840, 643,680, 965,520, 1,287,360, 1,609,200, 1,931,040, 2,252,880, 2,574,720, 2,896,560, 3,218,400
- Square
- 321,840 × 321,840 = 103,580,985,600
- Square root
- ≈ 567.31
- Sum of the digits
- 3 + 2 + 1 + 8 + 4 + 0 = 18
- Rounded to the nearest 10
- 321,840
- Rounded to the nearest 100
- 321,800
- Rounded to the nearest 1000
- 322,000
- Number before
- 321,839
- Number after
- 321,841
- In binary
1001110100100110000
Quick check
What number comes just after 321,840?
Show the answer
321,841
Is 321,840 even or odd?
Show the answer
Even
What is 321,840 + 10?
Show the answer
321,850
Practice with a game
Factors, Multiples & Primes
Multiples, factors, prime numbers, square numbers and prime factors.
Number Patterns
Find the missing number in a sequence.Frequently asked questions
How do you write 321,840 in words?
321,840 is written "three hundred twenty-one thousand eight hundred forty".
Is 321,840 a prime number?
No. 321,840 is a composite number, because it has more than two factors.