3440
3440 City of Truro was claimed to have reached 100 mph in 1904.
- Even
- Composite
Where 3440 fits
Why 3440 is special
The claim was timed by one person with a stopwatch and was not published at the time, so it remains disputed rather than recognised.
Factors & digit properties
- Divisors (20)
- 1, 2, 4, 5, 8, 10, 16, 20, 40, 43, 80, 86, 172, 215, 344, 430, 688, 860, 1720, 3440
- Prime factorisation
- 2^4 × 5 × 43
- Digit sum
- 11
- Digital root
- 2
Representations
- Decimal
- 3440
- Scientific notation
- 3.440 × 10^3
Roman numerals
M M M C D X L
MMMCDXL uses the subtractive pair XL: ten before fifty — fifty minus ten.
Binary
1 1 0 1 0 1 1 1 0 0 0 0
1 × 2,048 + 1 × 1,024 + 0 × 512 + 1 × 256 + 0 × 128 + 1 × 64 + 1 × 32 + 1 × 16 + 0 × 8 + 0 × 4 + 0 × 2 + 0 × 1 = 3,440
Octal
6 5 6 0
6 × 512 + 5 × 64 + 6 × 8 + 0 × 1 = 3,440
Hexadecimal
d 7 0
d × 256 + 7 × 16 + 0 × 1 = 3,440
Read as powers of two: 2,048 + 1,024 + 256 + 64 + 32 + 16 = 3,440.
In historical numeral systems
Egyptian
3 lotuses, 4 coils of rope, 4 hobbles
3 × 1,000 + 4 × 100 + 4 × 10 = 3,440. The signs are simply repeated and added; where they sit on the line is a matter of layout, not value.
Babylonian
5 corner wedges + 7 vertical wedges (sixties place), 2 corner wedges (units place)
57 × 60 + 20 = 3440. Places are separated by a space on the tablet, with the higher place written first.
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
Mallard's record was formally timed and City of Truro's 1904 claim rests on a single observer with a stopwatch.
View 4468 →Other connections
- contrasts with4468
why?
Strength 0.50, confidence "high".
History
GWR locomotive 3440 City of Truro was reported to have exceeded 100 mph on a descent in May 1904. The timing rests on a single observer's record, and the claim is not universally accepted.
DocumentedHistoryGeography: United KingdomPeriod: 1904
Common questions
Is 3440 a prime number?
No, 3440 is not prime.
What are the factors of 3440?
The factors of 3440 are 1, 2, 4, 5, 8, 10, 16, 20, 40, 43, 80, 86, 172, 215, 344, 430, 688, 860, 1720, 3440.
What is 3440 in Roman numerals?
3440 in Roman numerals is MMMCDXL. XL is subtractive: ten before fifty — fifty minus ten. Written additively it would be MMMCCCCXXXX, which Roman inscriptions used freely — the strict subtractive form is a later convention.
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: 15 July 2026