7538
NGC 7538 contains the largest known protostar.
- Even
- Composite
Where 7538 fits
Why 7538 is special
The object forming inside it is roughly three hundred times the diameter of the solar system, which is a scale that makes the term protostar misleading.
Factors & digit properties
- Divisors (4)
- 1, 2, 3769, 7538
- Prime factorisation
- 2 × 3769
- Digit sum
- 23
- Digital root
- 5
Representations
- Decimal
- 7538
- Scientific notation
- 7.538 × 10^3
Roman numerals
Roman numerals as modelled here goes up to 3,999.
Binary
1 1 1 0 1 0 1 1 1 0 0 1 0
1 × 4,096 + 1 × 2,048 + 1 × 1,024 + 0 × 512 + 1 × 256 + 0 × 128 + 1 × 64 + 1 × 32 + 1 × 16 + 0 × 8 + 0 × 4 + 1 × 2 + 0 × 1 = 7,538
Octal
1 6 5 6 2
1 × 4,096 + 6 × 512 + 5 × 64 + 6 × 8 + 2 × 1 = 7,538
Hexadecimal
1 d 7 2
1 × 4,096 + d × 256 + 7 × 16 + 2 × 1 = 7,538
Read as powers of two: 4,096 + 2,048 + 1,024 + 256 + 64 + 32 + 16 + 2 = 7,538.
In historical numeral systems
Egyptian
7 lotuses, 5 coils of rope, 3 hobbles, 8 strokes
7 × 1,000 + 5 × 100 + 3 × 10 + 8 × 1 = 7,538. The signs are simply repeated and added; where they sit on the line is a matter of layout, not value.
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
- Deficient number
- Semiprime
Related numbers & connections
Both are heavily obscured star-forming regions studied principally in the infrared.
View 6334 →Other connections
- is associated with6334
why?
Strength 0.50, confidence "high".
Science
NGC 7538 is a star-forming region containing what is reported as the largest known protostar, with a disc structure on the order of hundreds of astronomical units.
DocumentedSciencePeriod: 1787–
Common questions
Is 7538 a prime number?
No, 7538 is not prime.
What are the factors of 7538?
The factors of 7538 are 1, 2, 3769, 7538.
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: 15 July 2026