1808
1808 is the year the Atlantic slave trade became illegal in the United States.
- Even
- Composite
Where 1808 fits
Why 1808 is special
Congress prohibited importation from the earliest date the Constitution allowed. Domestic slavery and internal trading continued and expanded for another fifty-seven years.
1808 is part of
Factors & digit properties
- Divisors (10)
- 1, 2, 4, 8, 16, 113, 226, 452, 904, 1808
- Prime factorisation
- 2^4 × 113
- Digit sum
- 17
- Digital root
- 8
Representations
- Decimal
- 1808
- Binary
- 11100010000
- Octal
- 3420
- Hexadecimal
- 710
- Roman numeral
- MDCCCVIII
- Scientific notation
- 1.808 × 10^3
Other mathematical patterns
- Deficient number
- Happy number
Related numbers & connections
Britain banned the slave trade in 1807 and the United States prohibited importation from 1808, the earliest date its constitution allowed. Both left slavery itself untouched.
View 1807 →Other connections
- contrasts with1807
why?
Strength 0.50, confidence "high".
Law & regulation
The US Constitution barred Congress from prohibiting the slave trade before 1808, and the prohibition took effect on the first day it could. The internal trade grew substantially afterwards, so the ban changed the source rather than the institution.
DocumentedLaw & regulationGeography: United StatesPeriod: 1808
Common questions
Is 1808 a prime number?
No, 1808 is not prime.
What are the factors of 1808?
The factors of 1808 are 1, 2, 4, 8, 16, 113, 226, 452, 904, 1808.
What is 1808 in Roman numerals?
1808 in Roman numerals is MDCCCVIII.
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