27 times 27 is 729. In symbols: 27 × 27 = 729 (27 squared).
27 × 27 means adding 27 to itself 27 times: that is 27 copies of 27, which add up to 729.
27, 54, 81, 108, 135, 162, 189, 216, 243, 270, 297, 324, ... (keep going to the 27th multiple). The 27th multiple of 27 is 729.
27 × 27 = 27 × 20 + 27 × 7 = 540 + 189 = 729.
729 ÷ 27 = 27
729 is odd and a perfect square. Prime factorization: 3 × 3 × 3 × 3 × 3 × 3.
| Multiplication | Answer |
|---|---|
| 26 × 27 | 702 |
| 27 × 28 | 756 |
| 27 × 29 | 783 |
| 25 × 27 | 675 |
See also: 27 squared.
Other numbers? Browse the multiplication table, the squares and cubes or the exponent calculator.