604
NGC 604 is a giant star-forming region in another galaxy.
- Even
- Composite
Where 604 fits
Why 604 is special
It is roughly forty times the diameter of the Orion Nebula, which makes it a case where distance is an advantage: the whole region fits in one view.
Factors & digit properties
- Divisors (6)
- 1, 2, 4, 151, 302, 604
- Prime factorisation
- 2^2 × 151
- Digit sum
- 10
- Digital root
- 1
Representations
- Decimal
- 604
- Scientific notation
- 6.040 × 10^2
Roman numerals
D C I V
DCIV uses the subtractive pair IV: one before five — five minus one.
Binary
1 0 0 1 0 1 1 1 0 0
1 × 512 + 0 × 256 + 0 × 128 + 1 × 64 + 0 × 32 + 1 × 16 + 1 × 8 + 1 × 4 + 0 × 2 + 0 × 1 = 604
Octal
1 1 3 4
1 × 512 + 1 × 64 + 3 × 8 + 4 × 1 = 604
Hexadecimal
2 5 c
2 × 256 + 5 × 16 + c × 1 = 604
Read as powers of two: 512 + 64 + 16 + 8 + 4 = 604.
In historical numeral systems
Egyptian
6 coils of rope, 4 strokes
6 × 100 + 4 × 1 = 604. The signs are simply repeated and added; where they sit on the line is a matter of layout, not value.
Babylonian
1 corner wedge (sixties place), 4 vertical wedges (units place)
10 × 60 + 4 = 604. Places are separated by a space on the tablet, with the higher place written first.
Greek (Ionic)
chi, then delta, marked as a numeral
chi-delta + keraia
chi + 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 resh, then dalet
tav-resh-dalet
tav (400) + resh (200) + dalet (4) = 604, 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
Both are giant star-forming regions in other galaxies, far larger than anything comparable in the Milky Way.
View 2070 →Science
NGC 604 is an H II region in the Triangulum Galaxy, around 1,500 light years across and far larger than any comparable region in the Milky Way.
DocumentedSciencePeriod: 1784–
Common questions
Is 604 a prime number?
No, 604 is not prime.
What are the factors of 604?
The factors of 604 are 1, 2, 4, 151, 302, 604.
What is 604 in Roman numerals?
604 in Roman numerals is DCIV. IV is subtractive: one before five — five minus one. Written additively it would be DCIIII, 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