464
The Amstrad CPC 464 shipped with its tape drive built in.
- Even
- Composite
Where 464 fits
Why 464 is special
Selling the computer, the tape deck and the monitor as one unit at one price was the whole commercial idea, at a time when rivals sold three separate purchases.
464 is part of
Factors & digit properties
- Divisors (10)
- 1, 2, 4, 8, 16, 29, 58, 116, 232, 464
- Prime factorisation
- 2^4 × 29
- Digit sum
- 14
- Digital root
- 5
Representations
- Decimal
- 464
- Scientific notation
- 4.640 × 10^2
Roman numerals
C D L X I V
CDLXIV uses the subtractive pair IV: one before five — five minus one.
Binary
1 1 1 0 1 0 0 0 0
1 × 256 + 1 × 128 + 1 × 64 + 0 × 32 + 1 × 16 + 0 × 8 + 0 × 4 + 0 × 2 + 0 × 1 = 464
Octal
7 2 0
7 × 64 + 2 × 8 + 0 × 1 = 464
Hexadecimal
1 d 0
1 × 256 + d × 16 + 0 × 1 = 464
Read as powers of two: 256 + 128 + 64 + 16 = 464.
In historical numeral systems
Egyptian
4 coils of rope, 6 hobbles, 4 strokes
4 × 100 + 6 × 10 + 4 × 1 = 464. The signs are simply repeated and added; where they sit on the line is a matter of layout, not value.
Babylonian
7 vertical wedges (sixties place), 4 corner wedges + 4 vertical wedges (units place)
7 × 60 + 44 = 464. Places are separated by a space on the tablet, with the higher place written first.
Greek (Ionic)
upsilon, then xi, then delta, marked as a numeral
upsilon-xi-delta + keraia
upsilon + xi + 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 samekh, then dalet
tav-samekh-dalet
tav (400) + samekh (60) + dalet (4) = 464, 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
- Palindromic number
- Abundant number
- Happy number
Related numbers & connections
The CPC 464 shipped with a tape deck and the 6128 with a three-inch disk drive that no one else adopted.
View 6128 →Other connections
- is associated with6128
why?
Strength 0.50, confidence "high".
Technology & computing
The Amstrad CPC 464 integrated a cassette deck and was sold bundled with a dedicated monitor that also supplied power, removing the need for a television and separate recorder.
DocumentedTechnology & computingGeography: United Kingdom and continental EuropePeriod: 1984
Common questions
Is 464 a prime number?
No, 464 is not prime.
What are the factors of 464?
The factors of 464 are 1, 2, 4, 8, 16, 29, 58, 116, 232, 464.
What is 464 in Roman numerals?
464 in Roman numerals is CDLXIV. IV is subtractive: one before five — five minus one. Written additively it would be CCCCLXIIII, 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