852
+852 is the international calling code for Hong Kong.
- Even
- Composite
Where 852 fits
Why 852 is special
Hong Kong kept its own calling code after the 1997 transfer of sovereignty, as it kept its own currency and legal system. Calls between Hong Kong and mainland China are dialled internationally despite being within one country.
Factors & digit properties
- Divisors (12)
- 1, 2, 3, 4, 6, 12, 71, 142, 213, 284, 426, 852
- Prime factorisation
- 2^2 × 3 × 71
- Digit sum
- 15
- Digital root
- 6
Representations
- Decimal
- 852
- Scientific notation
- 8.520 × 10^2
Roman numerals
D C C C L I I
Binary
1 1 0 1 0 1 0 1 0 0
1 × 512 + 1 × 256 + 0 × 128 + 1 × 64 + 0 × 32 + 1 × 16 + 0 × 8 + 1 × 4 + 0 × 2 + 0 × 1 = 852
Octal
1 5 2 4
1 × 512 + 5 × 64 + 2 × 8 + 4 × 1 = 852
Hexadecimal
3 5 4
3 × 256 + 5 × 16 + 4 × 1 = 852
Read as powers of two: 512 + 256 + 64 + 16 + 4 = 852.
In historical numeral systems
Egyptian
8 coils of rope, 5 hobbles, 2 strokes
8 × 100 + 5 × 10 + 2 × 1 = 852. The signs are simply repeated and added; where they sit on the line is a matter of layout, not value.
Babylonian
1 corner wedge + 4 vertical wedges (sixties place), 1 corner wedge + 2 vertical wedges (units place)
14 × 60 + 12 = 852. Places are separated by a space on the tablet, with the higher place written first.
Greek (Ionic)
omega, then nu, then beta, marked as a numeral
omega-nu-beta + keraia
omega + nu + 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 tav, then nun, then bet
tav-tav-nun-bet
tav (400) + tav (400) + nun (50) + bet (2) = 852, 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
- Pentagonal number
Related numbers & connections
Hong Kong kept +852 after the 1997 transfer of sovereignty, as it kept its currency and legal system, so calls to mainland China's +86 are dialled internationally within one country.
View 86 →Geography
+852 reaches Hong Kong, which kept its own code after the 1997 transfer of sovereignty just as it kept its currency and legal system. Calls between Hong Kong and mainland China are dialled internationally.
DocumentedGeographyGeography: Hong Kong
Common questions
Is 852 a prime number?
No, 852 is not prime.
What are the factors of 852?
The factors of 852 are 1, 2, 3, 4, 6, 12, 71, 142, 213, 284, 426, 852.
What is 852 in Roman numerals?
852 in Roman numerals is DCCCLII.
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