Number

304

304 is a composite number, even, a calendar year.

Abundant Number Arithmetic Number Odious Number Pernicious Number Practical Number Recamán's Sequence Semiperfect Number Year

Historical context — 304 AD

Calendar year

Year 304 (CCCIV) was a leap year starting on Saturday of the Julian calendar.

Excerpt from Wikipedia (en) ↗ · Licensed CC BY-SA 4.0 · English fallback Read the full article on Wikipedia →

Historical context — 304 BC

Calendar year

Year 304 BC was a year of the pre-Julian Roman calendar.

Excerpt from Wikipedia (en) ↗ · Licensed CC BY-SA 4.0 · English fallback Read the full article on Wikipedia →

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

Parity: Even
Digit count: 3
Digit sum: 7
Digit product: 0
Digital root: 7
Palindrome: No
Bit width: 9 bits
Reversed: 403
Recamán's sequence: a(640) = 304
Square (n²): 92,416
Cube (n³): 28,094,464
Divisor count: 10
σ(n) — sum of divisors: 620
φ(n) — Euler's totient: 144
Sum of prime factors: 27

Primality

Prime factorization: 2 ⁴ × 19

Nearest primes: 293 (−11) · 307 (+3)

Divisors & multiples

All divisors (10)

1 · 2 · 4 · 8 · 16 · 19 · 38 · 76 · 152 (half) · 304

Aliquot sum (sum of proper divisors): 316

Factor pairs (a × b = 304)

1 × 304

2 × 152

4 × 76

8 × 38

16 × 19

First multiples

304 · 608 (double) · 912 · 1,216 · 1,520 · 1,824 · 2,128 · 2,432 · 2,736 · 3,040

Sums & aliquot sequence

As consecutive integers: 7 + 8 + … + 25

Aliquot sequence: 304 → 316 → 244 → 190 → 170 → 154 → 134 → 70 → 74 → 40 → 50 → 43 → 1 → 0 — terminates at zero

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)

In other bases

ternary (3) 102021

quaternary (4) 10300

quinary (5) 2204

senary (6) 1224

septenary (7) 613

nonary (9) 367

undecimal (11) 257

duodecimal (12) 214

tridecimal (13) 1a5

tetradecimal (14) 17a

pentadecimal (15) 154

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

In other modern scripts

Eastern Arabic ٣٠٤ Devanagari ३०४ Bengali ৩০৪ Tamil ௩௦௪ Thai ๓๐๔ Tibetan ༣༠༤ Khmer ៣០៤ Lao ໓໐໔ Burmese ၃၀၄

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 decomposition

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.

Unicode codepoint

Latin Capital Letter I With Dot Above

U+0130

Uppercase letter (Lu)

UTF-8 encoding: C4 B0 (2 bytes).

Lookup U+0130 on Compart ↗ Lookup on FileFormat.Info ↗

HTTP status code

HTTP 304 Not Modified — Cached resource is still fresh.

3xx class: Redirection.

Hex color

#000130

RGB(0, 1, 48)

IPv4 address

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.

NANP area code 304

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.

Look up area code 304 ↗

Calculator-display word

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.