The folowing table expresses '728' in various number bases. 'DRx' shows the result of 'digit reducing' resulting in an X-digit long number.
| Base | DR10 | DR9 | DR8 | DR7 | DR6 | DR5 | DR4 | DR3 | DR2 | DR1 |
|---|---|---|---|---|---|---|---|---|---|---|
| 2 | 1011011000 | 101 | 10 | 1 | ||||||
| 3 | 222222 | 110 | 2 | |||||||
| 4 | 23120 | 20 | 2 | |||||||
| 5 | 10403 | 13 | 4 | |||||||
| 6 | 3212 | 12 | 3 | |||||||
| 7 | 2060 | 11 | 2 | |||||||
| 8 | 1330 | 7 | ||||||||
| 9 | 888 | 26 | 8 | |||||||
| 10 | 728 | 17 | 8 | |||||||
| 11 | 602 | 8 | ||||||||
| 12 | 508 | 11 | 2 | |||||||
| 13 | 440 | 8 | ||||||||
| 14 | 3A0 | D | ||||||||
| 15 | 338 | E | ||||||||
| 16 | 2D8 | 17 | 8 |
Factors: 23 * 7 * 13
728 is in the Pythagorean Triple: (615, 728, 953).