672
+672 is the international calling code for Norfolk Island and Australian Antarctic Territory.
- Even
- Composite
Where 672 fits
Why 672 is special
One code covers a small Pacific island and Australia's Antarctic bases, which have almost nothing in common except administration.
Factors & digit properties
- Divisors (24)
- 1, 2, 3, 4, 6, 7, 8, 12, 14, 16, 21, 24, 28, 32, 42, 48, 56, 84, 96, 112, 168, 224, 336, 672
- Prime factorisation
- 2^5 × 3 × 7
- Digit sum
- 15
- Digital root
- 6
Representations
- Decimal
- 672
- Scientific notation
- 6.720 × 10^2
Roman numerals
D C L X X I I
Binary
1 0 1 0 1 0 0 0 0 0
1 × 512 + 0 × 256 + 1 × 128 + 0 × 64 + 1 × 32 + 0 × 16 + 0 × 8 + 0 × 4 + 0 × 2 + 0 × 1 = 672
Octal
1 2 4 0
1 × 512 + 2 × 64 + 4 × 8 + 0 × 1 = 672
Hexadecimal
2 a 0
2 × 256 + a × 16 + 0 × 1 = 672
Read as powers of two: 512 + 128 + 32 = 672.
In historical numeral systems
Egyptian
6 coils of rope, 7 hobbles, 2 strokes
6 × 100 + 7 × 10 + 2 × 1 = 672. The signs are simply repeated and added; where they sit on the line is a matter of layout, not value.
Babylonian
1 corner wedge + 1 vertical wedge (sixties place), 1 corner wedge + 2 vertical wedges (units place)
11 × 60 + 12 = 672. Places are separated by a space on the tablet, with the higher place written first.
Greek (Ionic)
chi, then omicron, then beta, marked as a numeral
chi-omicron-beta + keraia
chi + omicron + beta 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 resh, then ayin, then bet
tav-resh-ayin-bet
tav (400) + resh (200) + ayin (70) + bet (2) = 672, 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
Related numbers & connections
Norfolk Island and Australia's Antarctic territory share +672 and are both Australian administrations, which is a bureaucratic pairing rather than a geographic one.
View 61 →Other connections
- is associated with61
why?
Strength 0.50, confidence "high".
Geography
+672 covers Norfolk Island and Australia's Antarctic territory — an administrative pairing rather than a geographic one.
DocumentedGeographyGeography: Norfolk Island and Australian Antarctic Territory
Common questions
Is 672 a prime number?
No, 672 is not prime.
What are the factors of 672?
The factors of 672 are 1, 2, 3, 4, 6, 7, 8, 12, 14, 16, 21, 24, 28, 32, 42, 48, 56, 84, 96, 112, 168, 224, 336, 672.
What is 672 in Roman numerals?
672 in Roman numerals is DCLXXII.
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