72 in words
72
seventy-two
72 is written seventy-two.
Ways to write it
- As an ordinal
- seventy-second
- Roman numeral
- LXXII
- Expanded form
- 70 + 2
Place value
| Place | Digit | Value |
|---|---|---|
| tens | 7 | 70 |
| ones | 2 | 2 |
Number facts
- Even or odd
- Even
- Prime or composite
- Composite
- Factors
- 1, 2, 3, 4, 6, 8, 9, 12, 18, 24, 36 and 72 (12 factors)
- First 10 multiples
- 72, 144, 216, 288, 360, 432, 504, 576, 648, 720
- Square
- 72 × 72 = 5,184
- Square root
- ≈ 8.49
- Sum of the digits
- 7 + 2 = 9
- Rounded to the nearest 10
- 70
- Number before
- 71
- Number after
- 73
- In binary
1001000
Quick check
What number comes just after 72?
Show the answer
73
Is 72 even or odd?
Show the answer
Even
What is 72 + 10?
Show the answer
82
Practice with a game
Place Value Quest
Ones, tens, hundreds and thousands.
Times Tables Challenge
Practice any times table from 2× to 12×.Frequently asked questions
How do you write 72 in words?
72 is written "seventy-two".
Is 72 a prime number?
No. 72 is a composite number, because it has more than two factors.
What are the factors of 72?
The factors of 72 are 1, 2, 3, 4, 6, 8, 9, 12, 18, 24, 36 and 72.
How do you write 72 in Roman numerals?
72 in Roman numerals is LXXII.