724
724 is the ISO 3166-1 numeric country code for Spain.
- Even
- Composite
Where 724 fits
Why 724 is special
Spain's numeric code is used in EU statistical reporting alongside its two-letter code, with the numeric form preferred where systems must not depend on Latin script.
Factors & digit properties
- Divisors (6)
- 1, 2, 4, 181, 362, 724
- Prime factorisation
- 2^2 × 181
- Digit sum
- 13
- Digital root
- 4
Representations
- Decimal
- 724
- Scientific notation
- 7.240 × 10^2
Roman numerals
D C C X X I V
DCCXXIV uses the subtractive pair IV: one before five — five minus one.
Binary
1 0 1 1 0 1 0 1 0 0
1 × 512 + 0 × 256 + 1 × 128 + 1 × 64 + 0 × 32 + 1 × 16 + 0 × 8 + 1 × 4 + 0 × 2 + 0 × 1 = 724
Octal
1 3 2 4
1 × 512 + 3 × 64 + 2 × 8 + 4 × 1 = 724
Hexadecimal
2 d 4
2 × 256 + d × 16 + 4 × 1 = 724
Read as powers of two: 512 + 128 + 64 + 16 + 4 = 724.
In historical numeral systems
Egyptian
7 coils of rope, 2 hobbles, 4 strokes
7 × 100 + 2 × 10 + 4 × 1 = 724. The signs are simply repeated and added; where they sit on the line is a matter of layout, not value.
Babylonian
1 corner wedge + 2 vertical wedges (sixties place), 4 vertical wedges (units place)
12 × 60 + 4 = 724. Places are separated by a space on the tablet, with the higher place written first.
Greek (Ionic)
psi, then kappa, then delta, marked as a numeral
psi-kappa-delta + keraia
psi + kappa + delta 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 shin, then kaf, then dalet
tav-shin-kaf-dalet
tav (400) + shin (300) + kaf (20) + dalet (4) = 724, 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
Spain's ISO numeric code and calling code, assigned by different organisations for different purposes and both in continuous use.
View 34 →Other connections
- is associated with34
why?
Strength 0.50, confidence "high".
Geography
724 is Spain's ISO numeric code, used in EU statistical systems where a script-independent identifier is required.
DocumentedGeographyGeography: Spain
Common questions
Is 724 a prime number?
No, 724 is not prime.
What are the factors of 724?
The factors of 724 are 1, 2, 4, 181, 362, 724.
What is 724 in Roman numerals?
724 in Roman numerals is DCCXXIV. IV is subtractive: one before five — five minus one. Written additively it would be DCCXXIIII, 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