548
Port 548 carries Apple Filing Protocol.
- Even
- Composite
Where 548 fits
Why 548 is special
AFP was how Macs shared files for two decades before Apple moved to SMB. It was deprecated in 2019, which makes any device still answering on 548 a marker of equipment nobody has touched in years.
Factors & digit properties
- Divisors (6)
- 1, 2, 4, 137, 274, 548
- Prime factorisation
- 2^2 × 137
- Digit sum
- 17
- Digital root
- 8
Representations
- Decimal
- 548
- Scientific notation
- 5.480 × 10^2
Roman numerals
D X L V I I I
DXLVIII uses the subtractive pair XL: ten before fifty — fifty minus ten.
Binary
1 0 0 0 1 0 0 1 0 0
1 × 512 + 0 × 256 + 0 × 128 + 0 × 64 + 1 × 32 + 0 × 16 + 0 × 8 + 1 × 4 + 0 × 2 + 0 × 1 = 548
Octal
1 0 4 4
1 × 512 + 0 × 64 + 4 × 8 + 4 × 1 = 548
Hexadecimal
2 2 4
2 × 256 + 2 × 16 + 4 × 1 = 548
Read as powers of two: 512 + 32 + 4 = 548.
In historical numeral systems
Egyptian
5 coils of rope, 4 hobbles, 8 strokes
5 × 100 + 4 × 10 + 8 × 1 = 548. The signs are simply repeated and added; where they sit on the line is a matter of layout, not value.
Babylonian
9 vertical wedges (sixties place), 8 vertical wedges (units place)
9 × 60 + 8 = 548. Places are separated by a space on the tablet, with the higher place written first.
Greek (Ionic)
phi, then mu, then eta, marked as a numeral
phi-mu-eta + keraia
phi + mu + eta written in descending order and added — the letters carry their values wherever they stand, so this is addition, not place value.
Hebrew numerals
tav, then qof, then mem, then het
tav-qof-mem-het
tav (400) + qof (100) + mem (40) + het (8) = 548, written in descending order.
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
Related numbers & connections
NFS and AFP are the Unix and Apple approaches to sharing a filesystem over a network. Both trusted the client to state who the user was, and both have been superseded by SMB in practice.
View 2049 →Other connections
- is associated with2049
why?
Strength 0.50, confidence "high".
Technology & computing
Apple deprecated AFP in 2019 in favour of SMB. A machine still answering on port 548 is running software several major releases old, which makes the port a rough proxy for how well a network is maintained.
DocumentedTechnology & computing
Common questions
Is 548 a prime number?
No, 548 is not prime.
What are the factors of 548?
The factors of 548 are 1, 2, 4, 137, 274, 548.
What is 548 in Roman numerals?
548 in Roman numerals is DXLVIII. XL is subtractive: ten before fifty — fifty minus ten. Written additively it would be DXXXXVIII, 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: 1 reviewer-confirmed record, sourced and reviewed before publication.
Last reviewed: 15 July 2026