| Decimal | 40 |
| Binary | 101000 |
| Hexadecimal | 0x28 |
| Roman | XL |
| Dotted decimal | 0.0.0.40 |
| Square root of | 1600 |
| Factors | 5 2 2 2 |
| English | forty |
| Wikipedia Article about 40 | Wikipedia Article about 40 |
| RGB Color | #000028, |
| Number info: 40: ASCII code for | Open parenthesis (or open bracket) |
| random from 1 to 6 | Show |
| random from 1 to 10 | Show |
| random from 1 to 100 | Show |
| random from 1 to 1000 | Show |