576
576 bytes is the smallest datagram every IPv4 host must be able to reassemble.
Where 576 fits
Why 576 is special
The figure sets a floor rather than a normal size: any IPv4 implementation must handle at least this much, so protocols that must work everywhere keep messages under it. It is why DNS responses were historically capped at 512 bytes.
576 is part of
Factors & digit properties
- Divisors (21)
- 1, 2, 3, 4, 6, 8, 9, 12, 16, 18, 24, 32, 36, 48, 64, 72, 96, 144, 192, 288, 576
- Prime factorisation
- 2^6 × 3^2
- Digit sum
- 18
- Digital root
- 9
Representations
- Decimal
- 576
- Scientific notation
- 5.760 × 10^2
Roman numerals
D L X X V I
Binary
1 0 0 1 0 0 0 0 0 0
1 × 512 + 0 × 256 + 0 × 128 + 1 × 64 + 0 × 32 + 0 × 16 + 0 × 8 + 0 × 4 + 0 × 2 + 0 × 1 = 576
Octal
1 1 0 0
1 × 512 + 1 × 64 + 0 × 8 + 0 × 1 = 576
Hexadecimal
2 4 0
2 × 256 + 4 × 16 + 0 × 1 = 576
Read as powers of two: 512 + 64 = 576.
In historical numeral systems
Egyptian
5 coils of rope, 7 hobbles, 6 strokes
5 × 100 + 7 × 10 + 6 × 1 = 576. 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), 3 corner wedges + 6 vertical wedges (units place)
9 × 60 + 36 = 576. Places are separated by a space on the tablet, with the higher place written first.
Greek (Ionic)
phi, then omicron, then stigma, marked as a numeral
phi-omicron-stigma + keraia
phi + omicron + stigma 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 ayin, then vav
tav-qof-ayin-vav
tav (400) + qof (100) + ayin (70) + vav (6) = 576, 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
- Abundant number
- Powerful number
- Harshad (Niven) number
Related numbers & connections
The minimum packet size every host must handle: 576 bytes in IPv4, raised to 1,280 in IPv6. IPv6 also removed in-transit fragmentation, which makes its floor matter more than IPv4's ever did.
View 1280 →Other connections
- contrasts with1280
why?
Strength 0.50, confidence "high".
Technology & computing
Every IPv4 host must be able to reassemble a datagram of at least 576 bytes. Protocols that need to work everywhere stay under it rather than near it, which is why classic DNS responses were capped at 512 bytes and why larger ones fall back to TCP.
DocumentedTechnology & computing
Common questions
Is 576 a prime number?
No, 576 is not prime.
What are the factors of 576?
The factors of 576 are 1, 2, 3, 4, 6, 8, 9, 12, 16, 18, 24, 32, 36, 48, 64, 72, 96, 144, 192, 288, 576.
What is 576 in Roman numerals?
576 in Roman numerals is DLXXVI.
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