1890
1890 is the year of the Sherman Antitrust Act.
- Even
- Composite
Where 1890 fits
Why 1890 is special
It made agreements restraining trade illegal in the United States and was first used extensively against labour unions rather than corporations. Laws are shaped by who enforces them.
1890 connects to:
- historical years — appears in
- 1911 — contrasts with
Same number, different meanings
How 1890 is understood across different contexts — never implying one meaning because of another.
- Mathematics
It made agreements restraining trade illegal in the United States and was first used extensively against labour unions rather than corporations. Laws are shaped by who enforces them.
- Technology & computing
In 1890, Hollerith's punched-card tabulator processed the US census in a fraction of the time hand counting had taken (United States).
- Law & regulation
The Sherman Act was written against industrial trusts and its early application fell heavily on labour organising, which courts treated as a restraint of trade. The gap between a statute's target and its use is the durable lesson.
1890 is part of
Factors & digit properties
- Divisors (32)
- 1, 2, 3, 5, 6, 7, 9, 10, 14, 15, 18, 21, 27, 30, 35, 42, 45, 54, 63, 70, 90, 105, 126, 135, 189, 210, 270, 315, 378, 630, 945, 1890
- Prime factorisation
- 2 × 3^3 × 5 × 7
- Digit sum
- 18
- Digital root
- 9
Representations
- Decimal
- 1890
- Scientific notation
- 1.890 × 10^3
Roman numerals
M D C C C X C
MDCCCXC uses the subtractive pair XC: ten before a hundred — a hundred minus ten.
Binary
1 1 1 0 1 1 0 0 0 1 0
1 × 1,024 + 1 × 512 + 1 × 256 + 0 × 128 + 1 × 64 + 1 × 32 + 0 × 16 + 0 × 8 + 0 × 4 + 1 × 2 + 0 × 1 = 1,890
Octal
3 5 4 2
3 × 512 + 5 × 64 + 4 × 8 + 2 × 1 = 1,890
Hexadecimal
7 6 2
7 × 256 + 6 × 16 + 2 × 1 = 1,890
Read as powers of two: 1,024 + 512 + 256 + 64 + 32 + 2 = 1,890.
In historical numeral systems
Egyptian
1 lotus, 8 coils of rope, 9 hobbles
1 × 1,000 + 8 × 100 + 9 × 10 = 1,890. The signs are simply repeated and added; where they sit on the line is a matter of layout, not value.
Babylonian
3 corner wedges + 1 vertical wedge (sixties place), 3 corner wedges (units place)
31 × 60 + 30 = 1890. 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
- Harshad (Niven) number
Related numbers & connections
1890 is a year in the 19th century, in the 1890s.
The Sherman Act of 1890 was written against industrial trusts and used first against unions; the 1911 Standard Oil breakup finally applied it as intended.
View 1911 →Numbers Around Us
- appears inHistorical years
why?
Strength 0.50, confidence "high".
Other connections
- contrasts with1911
why?
Strength 0.50, confidence "high".
Technology & computing
In 1890, Hollerith's punched-card tabulator processed the US census in a fraction of the time hand counting had taken (United States).
DocumentedTechnology & computingGeography: United StatesPeriod: 1890
Law & regulation
The Sherman Act was written against industrial trusts and its early application fell heavily on labour organising, which courts treated as a restraint of trade. The gap between a statute's target and its use is the durable lesson.
DocumentedLaw & regulationGeography: United StatesPeriod: 1890
Common questions
Is 1890 a prime number?
No, 1890 is not prime.
What are the factors of 1890?
The factors of 1890 are 1, 2, 3, 5, 6, 7, 9, 10, 14, 15, 18, 21, 27, 30, 35, 42, 45, 54, 63, 70, 90, 105, 126, 135, 189, 210, 270, 315, 378, 630, 945, 1890.
What is 1890 in Roman numerals?
1890 in Roman numerals is MDCCCXC. XC is subtractive: ten before a hundred — a hundred minus ten. Written additively it would be MDCCCLXXXX, 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: 2 reviewer-confirmed records, sourced and reviewed before publication.
Last reviewed: 15 July 2026