350
The Airbus A350 is built largely from carbon fibre composite.
- Even
- Composite
Where 350 fits
Why 350 is special
It was Airbus's answer to the Boeing 787 and shares the same reasoning: composites allow higher cabin humidity and pressure than aluminium, which measurably reduces fatigue on long flights.
Same number, different meanings
How 350 is understood across different contexts — never implying one meaning because of another.
- Mathematics
It was Airbus's answer to the Boeing 787 and shares the same reasoning: composites allow higher cabin humidity and pressure than aluminium, which measurably reduces fatigue on long flights.
- Everyday life
There are about 350 billion email messages sent each day. Figure as of 2023. The majority is spam by count, filtered before anyone sees it. Estimates vary widely because most of the traffic is measured by the companies carrying it.
- Technology & computing
The A350 matched the 787's move from aluminium to carbon composite, allowing a cabin pressurised to a lower equivalent altitude with more humidity. Passenger fatigue on ultra-long routes is an engineering parameter, not just a comfort claim.
Factors & digit properties
- Divisors (12)
- 1, 2, 5, 7, 10, 14, 25, 35, 50, 70, 175, 350
- Prime factorisation
- 2 × 5^2 × 7
- Digit sum
- 8
- Digital root
- 8
Representations
- Decimal
- 350
- Scientific notation
- 3.500 × 10^2
Roman numerals
C C C L
Binary
1 0 1 0 1 1 1 1 0
1 × 256 + 0 × 128 + 1 × 64 + 0 × 32 + 1 × 16 + 1 × 8 + 1 × 4 + 1 × 2 + 0 × 1 = 350
Octal
5 3 6
5 × 64 + 3 × 8 + 6 × 1 = 350
Hexadecimal
1 5 e
1 × 256 + 5 × 16 + e × 1 = 350
Read as powers of two: 256 + 64 + 16 + 8 + 4 + 2 = 350.
In historical numeral systems
Egyptian
3 coils of rope, 5 hobbles
3 × 100 + 5 × 10 = 350. The signs are simply repeated and added; where they sit on the line is a matter of layout, not value.
Babylonian
5 vertical wedges (sixties place), 5 corner wedges (units place)
5 × 60 + 50 = 350. Places are separated by a space on the tablet, with the higher place written first.
Greek (Ionic)
tau, then nu, marked as a numeral
tau-nu + keraia
tau + nu written in descending order and added — the letters carry their values wherever they stand, so this is addition, not place value.
Hebrew numerals
shin, then nun
shin-nun
shin (300) + nun (50) = 350, written in descending order.
Maya
3 bars + 2 dots (upper, twenties place) over 2 bars (lower, units place)
17 × 20 + 10 = 350. Places stack vertically with the smallest at the bottom, so the upper group is worth twenty times the lower.
Systems that simply cannot reach this value are left out. Where a script needs a font most readers do not have, the reading is given instead of the glyphs — see number systems for each system in full.
Other mathematical patterns
- Abundant number
Related numbers & connections
The A350 replaced the A340 rather than the A330, because improving twin-engine reliability had removed the reason for four engines rather than the reason for a widebody.
View 330 →Everyday life
There are about 350 billion email messages sent each day. Figure as of 2023. The majority is spam by count, filtered before anyone sees it. Estimates vary widely because most of the traffic is measured by the companies carrying it.
DocumentedEveryday lifeGeography: worldwide
Technology & computing
The A350 matched the 787's move from aluminium to carbon composite, allowing a cabin pressurised to a lower equivalent altitude with more humidity. Passenger fatigue on ultra-long routes is an engineering parameter, not just a comfort claim.
DocumentedTechnology & computing
Common questions
Is 350 a prime number?
No, 350 is not prime.
What are the factors of 350?
The factors of 350 are 1, 2, 5, 7, 10, 14, 25, 35, 50, 70, 175, 350.
What is 350 in Roman numerals?
350 in Roman numerals is CCCL.
About this page's data
Mathematical facts:computed directly from the number's value — nothing to source or verify externally.
Contextual records: 2 reviewer-confirmed records, sourced and reviewed before publication.
Last reviewed: 15 July 2026