2400
2,400 bits per second was the modem speed at which downloading a photograph became conceivable.
- Even
- Composite
Where 2400 fits
Why 2400 is special
It also became the standard rate for early mobile data, and the same figure appears in industrial control systems that have never been updated.
Same number, different meanings
How 2400 is understood across different contexts — never implying one meaning because of another.
- Mathematics
It also became the standard rate for early mobile data, and the same figure appears in industrial control systems that have never been updated.
- Science
The Great Oxidation Event around 2,400 million years ago followed the spread of oxygenic photosynthesis. Free oxygen was toxic to much existing life, and the resulting change is recorded in banded iron formations.
- Technology & computing
2,400 bps persists as a default in SCADA and industrial control hardware decades after it disappeared from consumer use. Equipment that works is rarely replaced for speed alone.
Factors & digit properties
- Divisors (36)
- 1, 2, 3, 4, 5, 6, 8, 10, 12, 15, 16, 20, 24, 25, 30, 32, 40, 48, 50, 60, 75, 80, 96, 100, 120, 150, 160, 200, 240, 300, 400, 480, 600, 800, 1200, 2400
- Prime factorisation
- 2^5 × 3 × 5^2
- Digit sum
- 6
- Digital root
- 6
Representations
- Decimal
- 2400
- Binary
- 100101100000
- Octal
- 4540
- Hexadecimal
- 960
- Roman numeral
- MMCD
- Scientific notation
- 2.400 × 10^3
Other mathematical patterns
- Abundant number
- Harshad (Niven) number
Related numbers & connections
1,200 bits per second made an interactive terminal session tolerable and 2,400 doubled it. 2,400 still appears as a default in industrial control equipment decades later.
View 1200 →Other connections
- developed from1200
why?
Strength 0.50, confidence "high".
Science
The Great Oxidation Event around 2,400 million years ago followed the spread of oxygenic photosynthesis. Free oxygen was toxic to much existing life, and the resulting change is recorded in banded iron formations.
DocumentedScienceGeography: GlobalPeriod: c.2.4 billion years ago
Technology & computing
2,400 bps persists as a default in SCADA and industrial control hardware decades after it disappeared from consumer use. Equipment that works is rarely replaced for speed alone.
DocumentedTechnology & computing
Common questions
Is 2400 a prime number?
No, 2400 is not prime.
What are the factors of 2400?
The factors of 2400 are 1, 2, 3, 4, 5, 6, 8, 10, 12, 15, 16, 20, 24, 25, 30, 32, 40, 48, 50, 60, 75, 80, 96, 100, 120, 150, 160, 200, 240, 300, 400, 480, 600, 800, 1200, 2400.
What is 2400 in Roman numerals?
2400 in Roman numerals is MMCD.
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: 3 August 2026