1,188
1,188 is a composite number, even, a calendar year.
Historical context — 1188 AD
Calendar year
Year 1188 (MCLXXXVIII) was a leap year starting on Friday of the Julian 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, 1188
- Ended on
-
Saturday
December 31, 1188
- Friday the 13ths
-
1
One Friday the 13th this year.
- Decade
-
1180s
1180–1189
- Century
-
12th century
1101–1200
- Millennium
-
2nd millennium
1001–2000
- Years ago
-
838
838 years before 2026.
In other calendars
- Hebrew
-
4948 / 4949 AM
Rosh Hashanah falls in September/October.
- Islamic Hijri
-
583 / 584 AH
Lunar calendar; year spans differ from Gregorian.
- Chinese
-
Year of the zodiac:Earth zodiac:Monkey
Sexagenary cycle position 45 of 60. Lunar new year falls in late January / mid-February.
- Buddhist Era
-
1731 BE
Counted from the parinirvana of the Buddha (Theravada / Thai / Sri Lankan convention).
- Persian Solar Hijri
-
566 / 567 SH
Iranian calendar; Nowruz (new year) falls on the spring equinox.
- Ethiopian
-
1180 / 1181 ET
Year boundary at Enkutatash (September 11/12).
- Indian National (Saka)
-
1110 / 1109 Saka
Indian national calendar; year starts in March.
Properties
- Parity
- Even
- Digit count
- 4
- Digit sum
- 18
- Digit product
- 64
- Digital root
- 9
- Palindrome
- No
- Bit width
- 11 bits
- Reversed
- 8,811
- Flips to (rotate 180°)
- 8,811
- Recamán's sequence
- a(8,612) = 1,188
- Square (n²)
- 1,411,344
- Cube (n³)
- 1,676,676,672
- Divisor count
- 24
- σ(n) — sum of divisors
- 3,360
- φ(n) — Euler's totient
- 360
- Sum of prime factors
- 24
Primality
Prime factorization: 2 2 × 3 3 × 11
Divisors & multiples
Sums & aliquot sequence
Representations
- In words
- one thousand one hundred eighty-eight
- Ordinal
- 1188th
- Roman numeral
- MCLXXXVIII
- Binary
- 10010100100
- Octal
- 2244
- Hexadecimal
- 0x4A4
- Base64
- BKQ=
- One's complement
- 64,347 (16-bit)
Historical numeral systems
- Babylonian (base 60)
- 𒌋𒁹𒁹𒁹𒁹𒁹𒁹𒁹𒁹𒁹 𒌋𒌋𒌋𒌋𒁹𒁹𒁹𒁹𒁹𒁹𒁹𒁹
- Egyptian hieroglyphic
- 𓆼𓍢𓎆𓎆𓎆𓎆𓎆𓎆𓎆𓎆𓏺𓏺𓏺𓏺𓏺𓏺𓏺𓏺
- Greek (Milesian)
- ͵αρπηʹ
- Mayan (base 20)
- 𝋢·𝋳·𝋨
- Chinese
- 一千一百八十八
- Chinese (financial)
- 壹仟壹佰捌拾捌
Digit at this position in famous constants
- π — Pi (π)
- Digit 1,188 = 3
- e — Euler's number (e)
- Digit 1,188 = 9
- φ — Golden ratio (φ)
- Digit 1,188 = 8
- √2 — Pythagoras's (√2)
- Digit 1,188 = 3
- ln 2 — Natural log of 2
- Digit 1,188 = 5
- γ — Euler-Mascheroni (γ)
- Digit 1,188 = 2
Also seen as
Goldbach's conjecture says every even integer greater than 2 is the sum of two primes. For 1188, here are decompositions:
- 7 + 1181 = 1188
- 17 + 1171 = 1188
- 37 + 1151 = 1188
- 59 + 1129 = 1188
- 71 + 1117 = 1188
- 79 + 1109 = 1188
- 97 + 1091 = 1188
- 101 + 1087 = 1188
Showing the first eight; more decompositions exist.
UTF-8 encoding: D2 A4 (2 bytes).
As an unsigned 32-bit integer, this is the IPv4 address 0.0.4.164.
- Address
- 0.0.4.164
- Class
- reserved
- IPv4-mapped IPv6
- ::ffff:0.0.4.164
Unspecified address (0.0.0.0/8) — "this network" placeholder.
The digit sequence 1188 first appears in π at position 846 of the decimal expansion (the 846ordinal-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.