1758
1758 is the year Halley's Comet returned as predicted.
- Even
- Composite
Where 1758 fits
Why 1758 is special
Halley had died sixteen years earlier. The return confirmed that comets obey the same gravitation as planets, which was the strongest possible test of Newtonian theory at the time.
1758 is part of
Factors & digit properties
- Divisors (8)
- 1, 2, 3, 6, 293, 586, 879, 1758
- Prime factorisation
- 2 × 3 × 293
- Digit sum
- 21
- Digital root
- 3
Representations
- Decimal
- 1758
- Binary
- 11011011110
- Octal
- 3336
- Hexadecimal
- 6de
- Roman numeral
- MDCCLVIII
- Scientific notation
- 1.758 × 10^3
Other mathematical patterns
- Abundant number
- Happy number
Related numbers & connections
Halley designed a resupplied diving bell in 1716 and predicted the comet's 1758 return. Both are applications of the same willingness to work out a system's behaviour in advance.
View 1716 →Other connections
- developed from1716
why?
Strength 0.50, confidence "high".
Science
A comet arriving on schedule decades after its predictor's death confirmed that gravitation governed objects on extreme orbits, not just planets. No experiment available then could have tested the theory as severely.
DocumentedSciencePeriod: 1758
Common questions
Is 1758 a prime number?
No, 1758 is not prime.
What are the factors of 1758?
The factors of 1758 are 1, 2, 3, 6, 293, 586, 879, 1758.
What is 1758 in Roman numerals?
1758 in Roman numerals is MDCCLVIII.
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