80
Everything about the number 80 — its names, how to write it in other bases and numeral systems, and what makes it interesting mathematically.
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Names of 80
| Nominal | 80 |
| Cardinal | eighty |
| Ordinal | 80th |
| This number as US currency | eighty dollars |
Properties (and some facts) of 80
| Is 80 an odd number? | 80 is not an odd number |
| Is 80 an even number? | 80 is an even number |
| Is 80 a palindrome? | 80 is not a palindrome |
| Is 80 a triangle number? | 80 is not a triangle number |
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80 in other bases
| Base 2 (Binary) | 1010000 |
| Base 3 (Ternary) | 2222 |
| Base 4 (Quaternary) | 1100 |
| Base 5 (Quinary) | 310 |
| Base 6 (Senary) | 212 |
| Base 8 (Octal) | 120 |
| Base 12 (Duodecimal) | 68 |
| Base 16 (Hexadecimal) | 50 |
| Base 20 (Vigesimal) | 40 |
Primes and factors tests for 80
| Is 80 a prime number? | 80 is not a prime number |
| Is 80 a perfect number? | 80 is not a perfect number |
| Is 80 a Mersenne prime? | 80 is not a Mersenne prime |
| Is 80 a Fermat prime? | 80 is not a Fermat prime |
| Is 80 a Fibonacci prime? | 80 is not a Fibonacci prime |
| Is 80 a partition prime? | 80 is not a partition prime |
| Is 80 a Pell prime? | 80 is not a Pell prime |
| Prime Factors | Prime factors of 80 |
80 in other numeral systems
| 80 in Roman numerals | LXXX |
| 80 in Chinese numerals | 捌拾 |
| 80 in Babylonian numerals |   |
| 80 in Egyptian numerals | 𓎍 |
Roots and squares for 80
| Is 80 a square number? | 80 is not a square number |
| Is 80 a cube number? | 80 is not a cube number |
| Square root of 80 | 8.9442719099992 |
| Cube root of 80 | 4.3088693800638 |
Recreational math for 80
| Number 80 reversed | 08 |
| Sum of the digits | 8 |
| Number of digits | 2 |
Arithmetic tables for 80
Other pages about 80
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