Number

308

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

Abundant Number Arithmetic Number Evil Number Harshad / Niven Practical Number Recamán's Sequence Semiperfect Number Year

Historical context — 308 AD

Calendar year

Year 308 (CCCVIII) was a leap year starting on Thursday of the Julian calendar.

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

Historical context — 308 BC

Calendar year

Year 308 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: 53
Long year: contains 53 ISO weeks.
Started on: Wednesday
January 1, 308
Ended on: Thursday
December 31, 308
Friday the 13ths: 2
2 Friday the 13ths this year.
Decade: 300s
300–309
Century: 4th century
301–400
Millennium: 1st millennium
1–1000
Years ago: 1,718
1718 years before 2026.

In other calendars

Hebrew: 4068 / 4069 AM
Rosh Hashanah falls in September/October.
Chinese: Year of the zodiac:Earth zodiac:Dragon
Sexagenary cycle position 5 of 60. Lunar new year falls in late January / mid-February.
Buddhist Era: 851 BE
Counted from the parinirvana of the Buddha (Theravada / Thai / Sri Lankan convention).
Ethiopian: 300 / 301 ET
Year boundary at Enkutatash (September 11/12).
Indian National (Saka): 230 / 229 Saka
Indian national calendar; year starts in March.

Properties

Parity: Even
Digit count: 3
Digit sum: 11
Digit product: 0
Digital root: 2
Palindrome: No
Bit width: 9 bits
Reversed: 803
Recamán's sequence: a(632) = 308
Square (n²): 94,864
Cube (n³): 29,218,112
Divisor count: 12
σ(n) — sum of divisors: 672
φ(n) — Euler's totient: 120
Sum of prime factors: 22

Primality

Prime factorization: 2 ² × 7 × 11

Nearest primes: 307 (−1) · 311 (+3)

Divisors & multiples

All divisors (12)

1 · 2 · 4 · 7 · 11 · 14 · 22 · 28 · 44 · 77 · 154 (half) · 308

Aliquot sum (sum of proper divisors): 364

Factor pairs (a × b = 308)

1 × 308

2 × 154

4 × 77

7 × 44

11 × 28

14 × 22

First multiples

308 · 616 (double) · 924 · 1,232 · 1,540 · 1,848 · 2,156 · 2,464 · 2,772 · 3,080

Sums & aliquot sequence

As consecutive integers: 41 + 42 + … + 47 35 + 36 + … + 42 23 + 24 + … + 33

Aliquot sequence: 308 → 364 → 420 → 924 → 1,764 → 3,423 → 1,825 → 469 → 75 → 49 → 8 → 7 → 1 → 0 — terminates at zero

Representations

In words: three hundred eight
Ordinal: 308th
Roman numeral: CCCVIII
Binary: 100110100
Octal: 464
Hexadecimal: 0x134
Base64: ATQ=
One's complement: 65,227 (16-bit)

In other bases

ternary (3) 102102

quaternary (4) 10310

quinary (5) 2213

senary (6) 1232

septenary (7) 620

nonary (9) 372

undecimal (11) 260

duodecimal (12) 218

tridecimal (13) 1a9

tetradecimal (14) 180

pentadecimal (15) 158

Historical numeral systems

Babylonian (base 60): 𒁹𒁹𒁹𒁹𒁹 𒁹𒁹𒁹𒁹𒁹𒁹𒁹𒁹
Egyptian hieroglyphic: 𓍢𓍢𓍢𓏺𓏺𓏺𓏺𓏺𓏺𓏺𓏺
Greek (Milesian): τηʹ
Mayan (base 20): 𝋯·𝋨
Chinese: 三百零八
Chinese (financial): 參佰零捌

In other modern scripts

Eastern Arabic ٣٠٨ Devanagari ३०८ Bengali ৩০৮ Tamil ௩௦௮ Thai ๓๐๘ Tibetan ༣༠༨ Khmer ៣០៨ Lao ໓໐໘ Burmese ၃၀၈

Digit at this position in famous constants

π — Pi (π): Digit 308 = 0
e — Euler's number (e): Digit 308 = 7
φ — Golden ratio (φ): Digit 308 = 2
√2 — Pythagoras's (√2): Digit 308 = 3
ln 2 — Natural log of 2: Digit 308 = 5
γ — Euler-Mascheroni (γ): Digit 308 = 5

Also seen as

Goldbach decomposition

Goldbach's conjecture says every even integer greater than 2 is the sum of two primes. For 308, here are decompositions:

31 + 277 = 308
37 + 271 = 308
67 + 241 = 308
79 + 229 = 308
97 + 211 = 308
109 + 199 = 308
127 + 181 = 308
151 + 157 = 308

Showing the first eight; more decompositions exist.

Unicode codepoint

Latin Capital Letter J With Circumflex

U+0134

Uppercase letter (Lu)

UTF-8 encoding: C4 B4 (2 bytes).

Lookup U+0134 on Compart ↗ Lookup on FileFormat.Info ↗

HTTP status code

HTTP 308 Permanent Redirect — Same as 301 but the request method must not change.

3xx class: Redirection.

Hex color

#000134

RGB(0, 1, 52)

IPv4 address

As an unsigned 32-bit integer, this is the IPv4 address 0.0.1.52.

Address: 0.0.1.52
Class: reserved
IPv4-mapped IPv6: ::ffff:0.0.1.52

Unspecified address (0.0.0.0/8) — "this network" placeholder.

NANP area code 308

The number 308 is an active NANP area code (North American Numbering Plan).

Primary area: Western Nebraska
Region: Nebraska
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 308 ↗