340
The Airbus A340 has four engines and was outlived by its twin-engined sibling.
- Even
- Composite
Where 340 fits
Why 340 is special
It was designed when regulations restricted twins over oceans. Those rules relaxed and fuel prices rose, so the A330 it was developed alongside remained in production long after the A340 stopped.
Factors & digit properties
- Divisors (12)
- 1, 2, 4, 5, 10, 17, 20, 34, 68, 85, 170, 340
- Prime factorisation
- 2^2 × 5 × 17
- Digit sum
- 7
- Digital root
- 7
Representations
- Decimal
- 340
- Binary
- 101010100
- Octal
- 524
- Hexadecimal
- 154
- Roman numeral
- CCCXL
- Scientific notation
- 3.400 × 10^2
Other mathematical patterns
- Abundant number
Related numbers & connections
The A340 has four engines and the A350 two. Relaxed over-water rules and fuel cost made the four-engine layout obsolete rather than any deficiency in the aircraft.
View 350 →Other connections
- contrasts with350
why?
Strength 0.50, confidence "high".
Technology & computing
The A340 was built for a regulatory world that required more than two engines over water. When that requirement relaxed the aircraft's whole rationale went with it.
DocumentedTechnology & computing
Common questions
Is 340 a prime number?
No, 340 is not prime.
What are the factors of 340?
The factors of 340 are 1, 2, 4, 5, 10, 17, 20, 34, 68, 85, 170, 340.
What is 340 in Roman numerals?
340 in Roman numerals is CCCXL.
About this page's data
Mathematical facts:computed directly from the number's value — nothing to source or verify externally.
Contextual records: 1 reviewer-confirmed record, sourced and reviewed before publication.
Last reviewed: 3 August 2026