1138
THX 1138 is George Lucas's first film, and the number appears hidden in almost everything he made since.
- Even
- Composite
Where 1138 fits
Why 1138 is special
It is on a droid in Star Wars, a cell block in the same film, a licence plate in American Graffiti and a racing car in The Phantom Menace. The practice of hiding a signature number in later work spread widely from this example.
Factors & digit properties
- Divisors (4)
- 1, 2, 569, 1138
- Prime factorisation
- 2 × 569
- Digit sum
- 13
- Digital root
- 4
Representations
- Decimal
- 1138
- Binary
- 10001110010
- Octal
- 2162
- Hexadecimal
- 472
- Roman numeral
- MCXXXVIII
- Scientific notation
- 1.138 × 10^3
Other mathematical patterns
- Deficient number
- Semiprime
Related numbers & connections
Two numbers that entered culture through a single work: a phone number from a 1981 song, and a filmmaker's first feature title hidden in everything he made afterwards.
View 8675309 →Other connections
- is associated with8675309
why?
Strength 0.50, confidence "high".
Media & popular culture
1138 recurs across Lucas's films as a deliberate reference to his own first feature — a cell block, a droid, a licence plate. It is one of the earliest and most-copied examples of a filmmaker signing later work with a number from an earlier one.
DocumentedMedia & popular cultureCulture: American cinema
Common questions
Is 1138 a prime number?
No, 1138 is not prime.
What are the factors of 1138?
The factors of 1138 are 1, 2, 569, 1138.
What is 1138 in Roman numerals?
1138 in Roman numerals is MCXXXVIII.
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