1,288
1,288 is a composite number, even, a calendar year.
Historical context — 1288 AD
Calendar year
Year 1288 (MCCLXXXVIII) was a leap year starting on Thursday 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
-
53
Long year: contains 53 ISO weeks.
- Started on
-
Thursday
January 1, 1288
- Ended on
-
Friday
December 31, 1288
- Friday the 13ths
-
2
2 Friday the 13ths this year.
- Decade
-
1280s
1280–1289
- Century
-
13th century
1201–1300
- Millennium
-
2nd millennium
1001–2000
- Years ago
-
738
738 years before 2026.
In other calendars
- Hebrew
-
5048 / 5049 AM
Rosh Hashanah falls in September/October.
- Islamic Hijri
-
686 / 687 AH
Lunar calendar; year spans differ from Gregorian.
- Chinese
-
Year of the zodiac:Earth zodiac:Rat
Sexagenary cycle position 25 of 60. Lunar new year falls in late January / mid-February.
- Buddhist Era
-
1831 BE
Counted from the parinirvana of the Buddha (Theravada / Thai / Sri Lankan convention).
- Persian Solar Hijri
-
666 / 667 SH
Iranian calendar; Nowruz (new year) falls on the spring equinox.
- Ethiopian
-
1280 / 1281 ET
Year boundary at Enkutatash (September 11/12).
- Indian National (Saka)
-
1210 / 1209 Saka
Indian national calendar; year starts in March.
Properties
Primality
Prime factorization: 2 3 × 7 × 23
Divisors & multiples
Sums & aliquot sequence
Representations
- In words
- one thousand two hundred eighty-eight
- Ordinal
- 1288th
- Roman numeral
- MCCLXXXVIII
- Binary
- 10100001000
- Octal
- 2410
- Hexadecimal
- 0x508
- Base64
- BQg=
- One's complement
- 64,247 (16-bit)
Historical numeral systems
- Babylonian (base 60)
- 𒌋𒌋𒁹 𒌋𒌋𒁹𒁹𒁹𒁹𒁹𒁹𒁹𒁹
- Egyptian hieroglyphic
- 𓆼𓍢𓍢𓎆𓎆𓎆𓎆𓎆𓎆𓎆𓎆𓏺𓏺𓏺𓏺𓏺𓏺𓏺𓏺
- Greek (Milesian)
- ͵ασπηʹ
- Mayan (base 20)
- 𝋣·𝋤·𝋨
- Chinese
- 一千二百八十八
- Chinese (financial)
- 壹仟貳佰捌拾捌
Digit at this position in famous constants
- π — Pi (π)
- Digit 1,288 = 6
- e — Euler's number (e)
- Digit 1,288 = 3
- φ — Golden ratio (φ)
- Digit 1,288 = 5
- √2 — Pythagoras's (√2)
- Digit 1,288 = 2
- ln 2 — Natural log of 2
- Digit 1,288 = 8
- γ — Euler-Mascheroni (γ)
- Digit 1,288 = 5
Also seen as
Goldbach's conjecture says every even integer greater than 2 is the sum of two primes. For 1288, here are decompositions:
- 5 + 1283 = 1288
- 11 + 1277 = 1288
- 29 + 1259 = 1288
- 59 + 1229 = 1288
- 71 + 1217 = 1288
- 101 + 1187 = 1288
- 107 + 1181 = 1288
- 137 + 1151 = 1288
Showing the first eight; more decompositions exist.
UTF-8 encoding: D4 88 (2 bytes).
As an unsigned 32-bit integer, this is the IPv4 address 0.0.5.8.
- Address
- 0.0.5.8
- Class
- reserved
- IPv4-mapped IPv6
- ::ffff:0.0.5.8
Unspecified address (0.0.0.0/8) — "this network" placeholder.
The digit sequence 1288 first appears in π at position 20,335 of the decimal expansion (the 20,335ordinal-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.