138 in words
138
one hundred thirty-eight
138 is written one hundred thirty-eight.
Ways to write it
- As an ordinal
- one hundred thirty-eighth
- Roman numeral
- CXXXVIII
- Expanded form
- 100 + 30 + 8
Place value
| Place | Digit | Value |
|---|---|---|
| hundreds | 1 | 100 |
| tens | 3 | 30 |
| ones | 8 | 8 |
Number facts
- Even or odd
- Even
- Prime or composite
- Composite
- Factors
- 1, 2, 3, 6, 23, 46, 69 and 138 (8 factors)
- First 10 multiples
- 138, 276, 414, 552, 690, 828, 966, 1,104, 1,242, 1,380
- Square
- 138 × 138 = 19,044
- Square root
- ≈ 11.75
- Sum of the digits
- 1 + 3 + 8 = 12
- Rounded to the nearest 10
- 140
- Rounded to the nearest 100
- 100
- Number before
- 137
- Number after
- 139
- In binary
10001010
Quick check
What number comes just after 138?
Show the answer
139
Is 138 even or odd?
Show the answer
Even
What is 138 + 10?
Show the answer
148
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Factors, Multiples & Primes
Multiples, factors, prime numbers, square numbers and prime factors.Frequently asked questions
How do you write 138 in words?
138 is written "one hundred thirty-eight".
Is 138 a prime number?
No. 138 is a composite number, because it has more than two factors.
What are the factors of 138?
The factors of 138 are 1, 2, 3, 6, 23, 46, 69 and 138.
How do you write 138 in Roman numerals?
138 in Roman numerals is CXXXVIII.