398,421 in words
398,421
three hundred and ninety-eight thousand four hundred and twenty-one
398,421 is written three hundred and ninety-eight thousand four hundred and twenty-one.
Ways to write it
- As an ordinal
- three hundred and ninety-eight thousand four hundred and twenty-first
- Expanded form
- 300,000 + 90,000 + 8,000 + 400 + 20 + 1
Place value
| Place | Digit | Value |
|---|---|---|
| hundred thousands | 3 | 300,000 |
| ten thousands | 9 | 90,000 |
| thousands | 8 | 8,000 |
| hundreds | 4 | 400 |
| tens | 2 | 20 |
| ones | 1 | 1 |
Number facts
- Even or odd
- Odd
- Prime or composite
- Composite
- Factors
- 1, 3, 9, 44,269, 132,807 and 398,421 (6 factors)
- First 10 multiples
- 398,421, 796,842, 1,195,263, 1,593,684, 1,992,105, 2,390,526, 2,788,947, 3,187,368, 3,585,789, 3,984,210
- Square
- 398,421 × 398,421 = 158,739,293,241
- Square root
- ≈ 631.21
- Sum of the digits
- 3 + 9 + 8 + 4 + 2 + 1 = 27
- Rounded to the nearest 10
- 398,420
- Rounded to the nearest 100
- 398,400
- Rounded to the nearest 1000
- 398,000
- Number before
- 398,420
- Number after
- 398,422
- In binary
1100001010001010101
Quick check
What number comes just after 398,421?
Show the answer
398,422
Is 398,421 even or odd?
Show the answer
Odd
What is 398,421 + 10?
Show the answer
398,431
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 398,421 in words?
398,421 is written "three hundred and ninety-eight thousand four hundred and twenty-one".
Is 398,421 a prime number?
No. 398,421 is a composite number, because it has more than two factors.
What are the factors of 398,421?
The factors of 398,421 are 1, 3, 9, 44,269, 132,807 and 398,421.