820
Everything about the number 820 — its names, how to write it in other bases and numeral systems, and what makes it interesting mathematically.
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Names of 820
| Nominal | 820 |
| Cardinal | eight hundred twenty |
| Ordinal | 820th |
| This number as US currency | eight hundred twenty dollars |
Properties (and some facts) of 820
| Is 820 an odd number? | 820 is not an odd number |
| Is 820 an even number? | 820 is an even number |
| Is 820 a palindrome? | 820 is not a palindrome |
| Is 820 a triangle number? | 820 is a triangle number |
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820 in other bases
| Base 2 (Binary) | 1100110100 |
| Base 3 (Ternary) | 1010101 |
| Base 4 (Quaternary) | 30310 |
| Base 5 (Quinary) | 11240 |
| Base 6 (Senary) | 3444 |
| Base 8 (Octal) | 1464 |
| Base 12 (Duodecimal) | 584 |
| Base 16 (Hexadecimal) | 334 |
| Base 20 (Vigesimal) | 210 |
Primes and factors tests for 820
| Is 820 a prime number? | 820 is not a prime number |
| Is 820 a perfect number? | 820 is not a perfect number |
| Is 820 a Mersenne prime? | 820 is not a Mersenne prime |
| Is 820 a Fermat prime? | 820 is not a Fermat prime |
| Is 820 a Fibonacci prime? | 820 is not a Fibonacci prime |
| Is 820 a partition prime? | 820 is not a partition prime |
| Is 820 a Pell prime? | 820 is not a Pell prime |
| Prime Factors | Prime factors of 820 |
820 in other numeral systems
| 820 in Roman numerals | DCCCXX |
| 820 in Chinese numerals | 捌佰貳拾 |
| 820 in Babylonian numerals |   |
| 820 in Egyptian numerals | 𓍩𓎇 |
Roots and squares for 820
| Is 820 a square number? | 820 is not a square number |
| Is 820 a cube number? | 820 is not a cube number |
| Square root of 820 | 28.635642126553 |
| Cube root of 820 | 9.3599016231412 |
Recreational math for 820
| Number 820 reversed | 028 |
| Sum of the digits | 10 |
| Number of digits | 3 |
Arithmetic tables for 820
Other pages about 820
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