octal number; base-8 number
A number expressed in base 8, using digits 0–7. Used in computing and mathematics.
The octal number 10 is 8 in decimal.
Decimal number (base 10), the most common numeral system.
Hexadecimal number (base 16), often used in computing alongside octal.
Standard kanji spelling using the numeral 八.
Variant using the Arabic numeral 8; common in technical contexts.
Compound of 八 (はち, 'eight') + 進数 (しんすう, 'base number'), literally 'eight-base number'.