1,138
1,138 is a composite number, even, a calendar year.
Historical context — 1138 AD
Calendar year
Year 1138 (MCXXXVIII) was a common year starting on Saturday 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, 1138
- Ended on
-
Saturday
December 31, 1138
- Friday the 13ths
-
1
One Friday the 13th this year.
- Decade
-
1130s
1130–1139
- Century
-
12th century
1101–1200
- Millennium
-
2nd millennium
1001–2000
- Years ago
-
888
888 years before 2026.
In other calendars
- Hebrew
-
4898 / 4899 AM
Rosh Hashanah falls in September/October.
- Islamic Hijri
-
532 / 533 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
-
1681 BE
Counted from the parinirvana of the Buddha (Theravada / Thai / Sri Lankan convention).
- Persian Solar Hijri
-
516 / 517 SH
Iranian calendar; Nowruz (new year) falls on the spring equinox.
- Ethiopian
-
1130 / 1131 ET
Year boundary at Enkutatash (September 11/12).
- Indian National (Saka)
-
1060 / 1059 Saka
Indian national calendar; year starts in March.
Properties
Primality
Prime factorization: 2 × 569
Divisors & multiples
Sums & aliquot sequence
Representations
- In words
- one thousand one hundred thirty-eight
- Ordinal
- 1138th
- Roman numeral
- MCXXXVIII
- Binary
- 10001110010
- Octal
- 2162
- Hexadecimal
- 0x472
- Base64
- BHI=
- One's complement
- 64,397 (16-bit)
Historical numeral systems
- Babylonian (base 60)
- 𒌋𒁹𒁹𒁹𒁹𒁹𒁹𒁹𒁹 𒌋𒌋𒌋𒌋𒌋𒁹𒁹𒁹𒁹𒁹𒁹𒁹𒁹
- Egyptian hieroglyphic
- 𓆼𓍢𓎆𓎆𓎆𓏺𓏺𓏺𓏺𓏺𓏺𓏺𓏺
- Greek (Milesian)
- ͵αρληʹ
- Mayan (base 20)
- 𝋢·𝋰·𝋲
- Chinese
- 一千一百三十八
- Chinese (financial)
- 壹仟壹佰參拾捌
Digit at this position in famous constants
- π — Pi (π)
- Digit 1,138 = 7
- e — Euler's number (e)
- Digit 1,138 = 1
- φ — Golden ratio (φ)
- Digit 1,138 = 0
- √2 — Pythagoras's (√2)
- Digit 1,138 = 3
- ln 2 — Natural log of 2
- Digit 1,138 = 6
- γ — Euler-Mascheroni (γ)
- Digit 1,138 = 8
Also seen as
Goldbach's conjecture says every even integer greater than 2 is the sum of two primes. For 1138, here are decompositions:
- 29 + 1109 = 1138
- 41 + 1097 = 1138
- 47 + 1091 = 1138
- 89 + 1049 = 1138
- 107 + 1031 = 1138
- 167 + 971 = 1138
- 191 + 947 = 1138
- 197 + 941 = 1138
Showing the first eight; more decompositions exist.
UTF-8 encoding: D1 B2 (2 bytes).
As an unsigned 32-bit integer, this is the IPv4 address 0.0.4.114.
- Address
- 0.0.4.114
- Class
- reserved
- IPv4-mapped IPv6
- ::ffff:0.0.4.114
Unspecified address (0.0.0.0/8) — "this network" placeholder.
The digit sequence 1138 first appears in π at position 5,698 of the decimal expansion (the 5,698ordinal-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.