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Everything about the number 728 — its names, how to write it in other bases and numeral systems, and what makes it interesting mathematically.
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Names of 728
| Nominal | 728 |
| Cardinal | seven hundred twenty-eight |
| Ordinal | 728th |
| This number as US currency | seven hundred twenty-eight dollars |
Properties (and some facts) of 728
| Is 728 an odd number? | 728 is not an odd number |
| Is 728 an even number? | 728 is an even number |
| Is 728 a palindrome? | 728 is not a palindrome |
| Is 728 a triangle number? | 728 is not a triangle number |
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728 in other bases
| Base 2 (Binary) | 1011011000 |
| Base 3 (Ternary) | 222222 |
| Base 4 (Quaternary) | 23120 |
| Base 5 (Quinary) | 10403 |
| Base 6 (Senary) | 3212 |
| Base 8 (Octal) | 1330 |
| Base 12 (Duodecimal) | 508 |
| Base 16 (Hexadecimal) | 2D8 |
| Base 20 (Vigesimal) | 1G8 |
Primes and factors tests for 728
| Is 728 a prime number? | 728 is not a prime number |
| Is 728 a perfect number? | 728 is not a perfect number |
| Is 728 a Mersenne prime? | 728 is not a Mersenne prime |
| Is 728 a Fermat prime? | 728 is not a Fermat prime |
| Is 728 a Fibonacci prime? | 728 is not a Fibonacci prime |
| Is 728 a partition prime? | 728 is not a partition prime |
| Is 728 a Pell prime? | 728 is not a Pell prime |
| Prime Factors | Prime factors of 728 |
728 in other numeral systems
| 728 in Roman numerals | DCCXXVIII |
| 728 in Chinese numerals | 柒佰貳拾捌 |
| 728 in Babylonian numerals |   |
| 728 in Egyptian numerals | 𓍨𓎇𓐁 |
Roots and squares for 728
| Is 728 a square number? | 728 is not a square number |
| Is 728 a cube number? | 728 is not a cube number |
| Square root of 728 | 26.981475126464 |
| Cube root of 728 | 8.9958828905508 |
Recreational math for 728
| Number 728 reversed | 827 |
| Sum of the digits | 17 |
| Number of digits | 3 |
Arithmetic tables for 728
Other pages about 728
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