304
304 is a composite number, even, a calendar year.
304 (three hundred four) is an even 3-digit number. It is a composite number with 10 divisors, and factors as 2⁴ × 19. Its proper divisors sum to 316, more than the number itself, making it an abundant number. Written other ways, in Roman numerals it is CCCIV and in binary, 100110000.
Interestingness
Historical context — 304 AD
Calendar year
Year 304 (CCCIV) was a leap year starting on Saturday of the Julian calendar.
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Historical context — 304 BC
Calendar year
Year 304 BC was a year of the pre-Julian Roman calendar.
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Year facts
- Year type
-
Leap year
Divisible by 4 and not by 100; February has 29 days.
- Days in year
- 366
- ISO weeks
- 52
- Started on
-
Friday
January 1, 304
- Ended on
-
Saturday
December 31, 304
- Friday the 13ths
-
1
One Friday the 13th this year.
- Decade
-
300s
300–309
- Century
-
4th century
301–400
- Millennium
-
1st millennium
1–1000
- Years ago
-
1,722
1722 years before 2026.
In other calendars
- Hebrew
-
4064 / 4065 AM
Rosh Hashanah falls in September/October.
- Chinese
-
Year of the zodiac:Wood zodiac:Rat
Sexagenary cycle position 1 of 60. Lunar new year falls in late January / mid-February.
- Buddhist Era
-
847 BE
Counted from the parinirvana of the Buddha (Theravada / Thai / Sri Lankan convention).
- Ethiopian
-
296 / 297 ET
Year boundary at Enkutatash (September 11/12).
- Indian National (Saka)
-
226 / 225 Saka
Indian national calendar; year starts in March.
Properties
Primality
Prime factorization: 2 4 × 19
Divisors & multiples
Sums & aliquot sequence
Continued fraction of √n
√304 = [17; (2, 3, 2, 1, 1, 1, 1, 1, 2, 3, 2, 34)]
Period length 12 — the block in parentheses repeats forever.
Representations
- In words
- three hundred four
- Ordinal
- 304th
- Roman numeral
- CCCIV
- Binary
- 100110000
- Octal
- 460
- Hexadecimal
- 0x130
- Base64
- ATA=
- One's complement
- 65,231 (16-bit)
- Scientific notation
- 3.04 × 10²
- As a duration
- 304 s = 5 minutes, 4 seconds
As an angle
Historical numeral systems
- Babylonian (base 60)
- 𒁹𒁹𒁹𒁹𒁹 𒁹𒁹𒁹𒁹
- Egyptian hieroglyphic
- 𓍢𓍢𓍢𓏺𓏺𓏺𓏺
- Greek (Milesian)
- τδʹ
- Mayan (base 20)
- 𝋯·𝋤
- Chinese
- 三百零四
- Chinese (financial)
- 參佰零肆
Digit at this position in famous constants
- π — Pi (π)
- Digit 304 = 4
- e — Euler's number (e)
- Digit 304 = 1
- φ — Golden ratio (φ)
- Digit 304 = 4
- √2 — Pythagoras's (√2)
- Digit 304 = 7
- ln 2 — Natural log of 2
- Digit 304 = 0
- γ — Euler-Mascheroni (γ)
- Digit 304 = 8
Also seen as
Goldbach's conjecture says every even integer greater than 2 is the sum of two primes. For 304, here are decompositions:
- 11 + 293 = 304
- 23 + 281 = 304
- 41 + 263 = 304
- 47 + 257 = 304
- 53 + 251 = 304
- 71 + 233 = 304
- 107 + 197 = 304
- 113 + 191 = 304
Showing the first eight; more decompositions exist.
UTF-8 encoding: C4 B0 (2 bytes).
HTTP 304 Not Modified — Cached resource is still fresh.
3xx class: Redirection.
As an unsigned 32-bit integer, this is the IPv4 address 0.0.1.48.
- Address
- 0.0.1.48
- Class
- reserved
- IPv4-mapped IPv6
- ::ffff:0.0.1.48
Unspecified address (0.0.0.0/8) — "this network" placeholder.
The number 304 is an active NANP area code (North American Numbering Plan).
- Primary area
- Statewide
- Region
- West Virginia
- Country
- United States
Most NANP area codes have multiple overlays in dense regions; the primary area listed is the historic/largest population center for this code.
Type 304 on a seven-segment calculator, flip it 180°, and the display reads:
hOE
A staple of calculator humor since pocket calculators put digits in front of bored students.
Heard as a frequency, 304 Hz is closest to:
- Concert pitch (A4 = 440 Hz): D♯4 (311.1 Hz, -40¢)
- Scientific pitch (C4 = 256 Hz): D♯4 (304.4 Hz, -2¢)
- Baroque pitch (A4 = 415 Hz): E4 (310.9 Hz, -39¢)
Related reading
- Egyptian hieroglyphic numerals — Seven hieroglyphs for every power of ten, from a single stroke to a million.