Numberwise

2108

ISO 2108 defines the International Standard Book Number.

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Where 2108 fits

Where 2108 fits: Culture & belief, Related numbersCulture & belief: Numbers assigned as identifiers. Related numbers: 3297, 3901.Culture & beliefNumbers assigned as identif…Related numbers329739012108
2108 connects to 2 worlds: culture & belief, related numbers.

Why 2108 is special

The ISBN grew from ten digits to thirteen in 2007 because the ten-digit space was running out, and the check digit is what catches a mistyped order.

2108 is part of

Identifier numbersNumbers around us

Factors & digit properties

Divisors (12)
1, 2, 4, 17, 31, 34, 62, 68, 124, 527, 1054, 2108
Prime factorisation
2^2 × 17 × 31
Digit sum
11
Digital root
2

Representations

Decimal
2108
Scientific notation
2.108 × 10^3

Roman numerals

M M C V I I I

Binary

1 0 0 0 0 0 1 1 1 1 0 0

1 × 2,048 + 0 × 1,024 + 0 × 512 + 0 × 256 + 0 × 128 + 0 × 64 + 1 × 32 + 1 × 16 + 1 × 8 + 1 × 4 + 0 × 2 + 0 × 1 = 2,108

Octal

4 0 7 4

4 × 512 + 0 × 64 + 7 × 8 + 4 × 1 = 2,108

Hexadecimal

8 3 c

8 × 256 + 3 × 16 + c × 1 = 2,108

Read as powers of two: 2,048 + 32 + 16 + 8 + 4 = 2,108.

In historical numeral systems

Egyptian

2 lotuses, 1 coil of rope, 8 strokes

2 × 1,000 + 1 × 100 + 8 × 1 = 2,108. The signs are simply repeated and added; where they sit on the line is a matter of layout, not value.

Babylonian

3 corner wedges + 5 vertical wedges (sixties place), 8 vertical wedges (units place)

35 × 60 + 8 = 2108. Places are separated by a space on the tablet, with the higher place written first.

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

Documented appearance
ISO 2108 defines the ISBN, making it a standard number that governs another identifier system.

ISO 2108 defines the ISBN, making it a standard number that governs another identifier system.

Connection
An ISBN identifies a book that is finished and an ISSN a publication that keeps arriving, which is why the two systems cannot be merged.

An ISBN identifies a book that is finished and an ISSN a publication that keeps arriving, which is why the two systems cannot be merged.

View 3297 →

Numbers Around Us

  • appears inNumbers assigned as identifiers
    why?

    Strength 0.50, confidence "high".

Other connections

  • contrasts with3297
    why?

    Strength 0.50, confidence "high".

  • is associated with3901
    why?

    Strength 0.50, confidence "high".

How is 2108 connected to another number? →

Technology & computing

  • ISO 2108 specifies the ISBN, administered nationally under an international agency. The move to thirteen digits aligned it with the GS1 barcode system used by retail generally.

    DocumentedTechnology & computingGeography: International — ISO member bodiesPeriod: 1970–

Common questions

Is 2108 a prime number?

No, 2108 is not prime.

What are the factors of 2108?

The factors of 2108 are 1, 2, 4, 17, 31, 34, 62, 68, 124, 527, 1054, 2108.

What is 2108 in Roman numerals?

2108 in Roman numerals is MMCVIII.

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