400,840 in words
400,840
four hundred thousand eight hundred forty
400,840 is written four hundred thousand eight hundred forty.
Ways to write it
- As an ordinal
- four hundred thousand eight hundred fortieth
- Expanded form
- 400,000 + 800 + 40
Place value
| Place | Digit | Value |
|---|---|---|
| hundred thousands | 4 | 400,000 |
| ten thousands | 0 | 0 |
| thousands | 0 | 0 |
| hundreds | 8 | 800 |
| tens | 4 | 40 |
| ones | 0 | 0 |
Number facts
- Even or odd
- Even
- Prime or composite
- Composite
- Factors
- 1, 2, 4, 5, 8, 10, 11, 20, 22, 40, 44, 55, 88, 110, 220, 440, 911, 1,822, 3,644, 4,555, 7,288, 9,110, 10,021, 18,220, 20,042, 36,440, 40,084, 50,105, 80,168, 100,210, 200,420 and 400,840 (32 factors)
- First 10 multiples
- 400,840, 801,680, 1,202,520, 1,603,360, 2,004,200, 2,405,040, 2,805,880, 3,206,720, 3,607,560, 4,008,400
- Square
- 400,840 × 400,840 = 160,672,705,600
- Square root
- ≈ 633.12
- Sum of the digits
- 4 + 0 + 0 + 8 + 4 + 0 = 16
- Rounded to the nearest 10
- 400,840
- Rounded to the nearest 100
- 400,800
- Rounded to the nearest 1000
- 401,000
- Number before
- 400,839
- Number after
- 400,841
- In binary
1100001110111001000
Quick check
What number comes just after 400,840?
Show the answer
400,841
Is 400,840 even or odd?
Show the answer
Even
What is 400,840 + 10?
Show the answer
400,850
Practise 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 400,840 in words?
400,840 is written "four hundred thousand eight hundred forty".
Is 400,840 a prime number?
No. 400,840 is a composite number, because it has more than two factors.
What are the factors of 400,840?
The factors of 400,840 are 1, 2, 4, 5, 8, 10, 11, 20, 22, 40, 44, 55, 88, 110, 220, 440, 911, 1,822, 3,644, 4,555, 7,288, 9,110, 10,021, 18,220, 20,042, 36,440, 40,084, 50,105, 80,168, 100,210, 200,420 and 400,840.