1990
1990 is the year Germany reunified and Nelson Mandela was released.
- Even
- Composite
Where 1990 fits
Why 1990 is special
Reunification took under a year from the Wall opening, faster than almost anyone had planned for. Mandela's release in February began a negotiation that produced South Africa's first democratic election four years later.
Factors & digit properties
- Divisors (8)
- 1, 2, 5, 10, 199, 398, 995, 1990
- Prime factorisation
- 2 × 5 × 199
- Digit sum
- 19
- Digital root
- 1
Representations
- Decimal
- 1990
- Binary
- 11111000110
- Octal
- 3706
- Hexadecimal
- 7c6
- Roman numeral
- MCMXC
- Scientific notation
- 1.990 × 10^3
Other mathematical patterns
- Deficient number
Related numbers & connections
The Berlin Wall opened in 1989 and Germany reunified in 1990, faster than any plan had anticipated.
View 1989 →Hubble launched in 1990 and Webb in 2021. Webb observes in the infrared and had to unfold itself after launch with no possibility of the repair missions Hubble depended on.
View 2021 →History
German reunification completed within a year of the Berlin Wall opening, well ahead of any prepared timetable. Mandela's release in February 1990 began the negotiations that produced South Africa's first democratic election four years later.
DocumentedHistoryPeriod: 1990
Common questions
Is 1990 a prime number?
No, 1990 is not prime.
What are the factors of 1990?
The factors of 1990 are 1, 2, 5, 10, 199, 398, 995, 1990.
What is 1990 in Roman numerals?
1990 in Roman numerals is MCMXC.
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