1,318
1,318 is a composite number, even, a calendar year.
1,318 (one thousand three hundred eighteen) is an even 4-digit number. It is a composite number with 4 divisors, and factors as 2 × 659. Written other ways, in Roman numerals it is MCCCXVIII and in binary, 10100100110.
Interestingness
Historical context — 1318 AD
Calendar year
Year 1318 (MCCCXVIII) was a common year starting on Sunday of the Julian calendar.
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Year facts
- Year type
-
Common year
Standard 365-day year; not divisible by 4 (or divisible by 100 but not 400).
- Days in year
- 365
- ISO weeks
- 52
- Started on
-
Saturday
January 1, 1318
- Ended on
-
Saturday
December 31, 1318
- Friday the 13ths
-
1
One Friday the 13th this year.
- Decade
-
1310s
1310–1319
- Century
-
14th century
1301–1400
- Millennium
-
2nd millennium
1001–2000
- Years ago
-
708
708 years before 2026.
In other calendars
- Hebrew
-
5078 / 5079 AM
Rosh Hashanah falls in September/October.
- Islamic Hijri
-
717 / 718 AH
Lunar calendar; year spans differ from Gregorian.
- Chinese
-
Year of the zodiac:Earth zodiac:Horse
Sexagenary cycle position 55 of 60. Lunar new year falls in late January / mid-February.
- Buddhist Era
-
1861 BE
Counted from the parinirvana of the Buddha (Theravada / Thai / Sri Lankan convention).
- Persian Solar Hijri
-
696 / 697 SH
Iranian calendar; Nowruz (new year) falls on the spring equinox.
- Ethiopian
-
1310 / 1311 ET
Year boundary at Enkutatash (September 11/12).
- Indian National (Saka)
-
1240 / 1239 Saka
Indian national calendar; year starts in March.
Properties
Primality
Prime factorization: 2 × 659
Divisors & multiples
Sums & aliquot sequence
Continued fraction of √n
√1,318 = [36; (3, 3, 2, 23, 1, 3, 3, 4, 1, 7, 3, 1, 9, 1, 1, 1, 1, 2, 11, 1, 2, 1, 1, 6, …)]
Period length 50 — the block in parentheses repeats forever.
Representations
- In words
- one thousand three hundred eighteen
- Ordinal
- 1318th
- Roman numeral
- MCCCXVIII
- Binary
- 10100100110
- Octal
- 2446
- Hexadecimal
- 0x526
- Base64
- BSY=
- One's complement
- 64,217 (16-bit)
- Scientific notation
- 1.318 × 10³
- As a duration
- 1,318 s = 21 minutes, 58 seconds
As an angle
Historical numeral systems
- Babylonian (base 60)
- 𒌋𒌋𒁹 𒌋𒌋𒌋𒌋𒌋𒁹𒁹𒁹𒁹𒁹𒁹𒁹𒁹
- Egyptian hieroglyphic
- 𓆼𓍢𓍢𓍢𓎆𓏺𓏺𓏺𓏺𓏺𓏺𓏺𓏺
- Greek (Milesian)
- ͵ατιηʹ
- Mayan (base 20)
- 𝋣·𝋥·𝋲
- Chinese
- 一千三百一十八
- Chinese (financial)
- 壹仟參佰壹拾捌
Digit at this position in famous constants
- π — Pi (π)
- Digit 1,318 = 2
- e — Euler's number (e)
- Digit 1,318 = 7
- φ — Golden ratio (φ)
- Digit 1,318 = 7
- √2 — Pythagoras's (√2)
- Digit 1,318 = 3
- ln 2 — Natural log of 2
- Digit 1,318 = 3
- γ — Euler-Mascheroni (γ)
- Digit 1,318 = 1
Also seen as
Goldbach's conjecture says every even integer greater than 2 is the sum of two primes. For 1318, here are decompositions:
- 11 + 1307 = 1318
- 17 + 1301 = 1318
- 29 + 1289 = 1318
- 41 + 1277 = 1318
- 59 + 1259 = 1318
- 89 + 1229 = 1318
- 101 + 1217 = 1318
- 131 + 1187 = 1318
Showing the first eight; more decompositions exist.
UTF-8 encoding: D4 A6 (2 bytes).
As an unsigned 32-bit integer, this is the IPv4 address 0.0.5.38.
- Address
- 0.0.5.38
- Class
- reserved
- IPv4-mapped IPv6
- ::ffff:0.0.5.38
Unspecified address (0.0.0.0/8) — "this network" placeholder.
Heard as a frequency, 1,318 Hz is closest to:
- Concert pitch (A4 = 440 Hz): E6 (1318.5 Hz, -1¢)
- Scientific pitch (C4 = 256 Hz): E6 (1290.2 Hz, +37¢)
- Baroque pitch (A4 = 415 Hz): F6 (1317.5 Hz, +1¢)
The digit sequence 1318 first appears in π at position 5,312 of the decimal expansion (the 5,312ordinal-suffix:th digit after the integer 3).
Search range: the first 1,000,000 fractional digits of π. Any 6-digit-or-shorter string is virtually guaranteed to appear in there — the more interesting signal is the position.
Related reading
- Egyptian hieroglyphic numerals — Seven hieroglyphs for every power of ten, from a single stroke to a million.