8
8 is a composite number (2³), considered highly auspicious in Chinese-speaking cultures.
Where 8 fits
Why 8 is special
Its identity as a perfect cube pairs with one of the strongest documented lucky-number associations in East Asian culture, rooted in a homophone with the word for prosperity.
8 connects to:
- 13 — is related through sequence
- fibonacci sequence — belongs to
- oxygen — has scientific association with
- color bit depth — appears in
- byte — appears in
- film gauge — appears in
- phyllotaxis petal pattern — appears in
- chinese speaking cultures — is culturally significant in
Same number, different meanings
How 8 is understood across different contexts — never implying one meaning because of another.
- Mathematics
Its identity as a perfect cube pairs with one of the strongest documented lucky-number associations in East Asian culture, rooted in a homophone with the word for prosperity.
- Technology & computing
A byte, the fundamental unit of digital storage and memory addressing, is defined as 8 bits — the reason storage capacities and character encodings are built around multiples of 8.
- Science
8 is the atomic number of oxygen, essential for respiration in most living organisms and the second most abundant gas in Earth's atmosphere.
- Culture
In Cantonese and Mandarin, 8 (八, bā) closely resembles the word for 'prosper' or 'wealth' (發, fā), making it one of the most sought-after numbers in Chinese-speaking contexts for phone numbers, addresses and prices.
Not just a mathematical number
8is also used in ways where ordinary arithmetic doesn't apply — each listed below with what genuinely does and doesn't follow from it.
- Mathematical number
A genuine quantity — its mathematical properties (prime, square, factors, and so on) are real facts about it.
A genuine quantity that ordinary arithmetic applies to — it can be prime, even, a perfect square, added to another number meaningfully, and so on.
- Measurement
Also used as a measurement — Byte.
A quantity expressed against a defined unit or standard (24 hours in a day, 60 seconds in a minute) — arithmetic is meaningful, but the specific value is a fixed convention of the measuring system, not a discovered mathematical property.
8 in Numbers Around Us
8 is part of
Factors & digit properties
- Divisors (4)
- 1, 2, 4, 8
- Prime factorisation
- 2^3
- Digit sum
- 8
- Digital root
- 8
Representations
- Decimal
- 8
- Binary
- 1000
- Octal
- 10
- Hexadecimal
- 8
- Roman numeral
- VIII
- Scientific notation
- 8.000 × 10^0
Other mathematical patterns
- Palindromic number
- Deficient number
- Powerful number
- Narcissistic (Armstrong) number
- Harshad (Niven) number
Related numbers & connections
8 and 13 are consecutive Fibonacci numbers.
View 13 →8 is a member of the Fibonacci sequence.
8 is the atomic number of oxygen.
Nearby in a sequence
- is related through sequence13
why?
Strength 0.50, confidence "high".
Shares a distinctive class
- belongs toFibonacci sequence
why?
Strength 0.50, confidence "high".
Scientific association
- has scientific association withOxygen (chemical element)
why?
Strength 0.50, confidence "high".
Numbers Around Us
- appears inColour bit depth
why?
Strength 0.50, confidence "high".
- appears inByte
why?
Strength 0.50, confidence "high".
- appears inFilm gauge
why?
Strength 0.50, confidence "high".
- appears inPhyllotaxis petal patterns
why?
Strength 0.50, confidence "high".
Culturally related
- is culturally significant inChinese-speaking contexts
why?
Strength 0.50, confidence "high".
Technology & computing
A byte, the fundamental unit of digital storage and memory addressing, is defined as 8 bits — the reason storage capacities and character encodings are built around multiples of 8.
DocumentedTechnology & computingA byte, the fundamental unit of digital storage and memory addressing, is defined as 8 bits — the reason storage capacities and character encodings are built around multiples of 8.
DocumentedTechnology & computing
Science
8 is the atomic number of oxygen, essential for respiration in most living organisms and the second most abundant gas in Earth's atmosphere.
DocumentedScience8 is the atomic number of oxygen, essential for respiration in most living organisms and the second most abundant gas in Earth's atmosphere.
DocumentedScience
Culture
In Cantonese and Mandarin, 8 (八, bā) closely resembles the word for 'prosper' or 'wealth' (發, fā), making it one of the most sought-after numbers in Chinese-speaking contexts for phone numbers, addresses and prices.
Widely documentedCultureCulture: ChineseGeography: Greater China and Chinese diaspora
Common questions
Is 8 a prime number?
No, 8 is not prime.
What are the factors of 8?
The factors of 8 are 1, 2, 4, 8.
What is 8 in Roman numerals?
8 in Roman numerals is VIII.
Is 8 a lucky number?
8 is considered lucky in Chinese-speaking contexts — a documented cultural association, not a mathematical property.
About this page's data
Mathematical facts:computed directly from the number's value — nothing to source or verify externally.
Contextual records: 5 reviewer-confirmed records, sourced and reviewed before publication.
Last reviewed: 15 July 2026