1,648
1,648 is a composite number, even, a calendar year.
Notable events — 1648 AD
- Oct 24 The Peace of Westphalia ends the Thirty Years' War.
- Jan 30 The Treaty of Munster recognizes Dutch independence.
- Dec 6 Pride's Purge expels royalist MPs from Parliament.
Events compiled from Wikipedia ↗ · Licensed CC BY-SA 4.0
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, 1648
- Ended on
-
Thursday
December 31, 1648
- Friday the 13ths
-
2
2 Friday the 13ths this year.
- Easter Sunday
-
April 12
Sunday, April 12, 1648
- Decade
-
1640s
1640–1649
- Century
-
17th century
1601–1700
- Millennium
-
2nd millennium
1001–2000
- Years ago
-
378
378 years before 2026.
In other calendars
- Hebrew
-
5408 / 5409 AM
Rosh Hashanah falls in September/October.
- Islamic Hijri
-
1057 / 1058 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
-
2191 BE
Counted from the parinirvana of the Buddha (Theravada / Thai / Sri Lankan convention).
- Persian Solar Hijri
-
1026 / 1027 SH
Iranian calendar; Nowruz (new year) falls on the spring equinox.
- Ethiopian
-
1640 / 1641 ET
Year boundary at Enkutatash (September 11/12).
- Indian National (Saka)
-
1570 / 1569 Saka
Indian national calendar; year starts in March.
Properties
Primality
Prime factorization: 2 4 × 103
Divisors & multiples
Sums & aliquot sequence
Representations
- In words
- one thousand six hundred forty-eight
- Ordinal
- 1648th
- Roman numeral
- MDCXLVIII
- Binary
- 11001110000
- Octal
- 3160
- Hexadecimal
- 0x670
- Base64
- BnA=
- One's complement
- 63,887 (16-bit)
Historical numeral systems
- Babylonian (base 60)
- 𒌋𒌋𒁹𒁹𒁹𒁹𒁹𒁹𒁹 𒌋𒌋𒁹𒁹𒁹𒁹𒁹𒁹𒁹𒁹
- Egyptian hieroglyphic
- 𓆼𓍢𓍢𓍢𓍢𓍢𓍢𓎆𓎆𓎆𓎆𓏺𓏺𓏺𓏺𓏺𓏺𓏺𓏺
- Greek (Milesian)
- ͵αχμηʹ
- Mayan (base 20)
- 𝋤·𝋢·𝋨
- Chinese
- 一千六百四十八
- Chinese (financial)
- 壹仟陸佰肆拾捌
Digit at this position in famous constants
- π — Pi (π)
- Digit 1,648 = 8
- e — Euler's number (e)
- Digit 1,648 = 1
- φ — Golden ratio (φ)
- Digit 1,648 = 3
- √2 — Pythagoras's (√2)
- Digit 1,648 = 7
- ln 2 — Natural log of 2
- Digit 1,648 = 4
- γ — Euler-Mascheroni (γ)
- Digit 1,648 = 2
Also seen as
Goldbach's conjecture says every even integer greater than 2 is the sum of two primes. For 1648, here are decompositions:
- 11 + 1637 = 1648
- 29 + 1619 = 1648
- 41 + 1607 = 1648
- 47 + 1601 = 1648
- 89 + 1559 = 1648
- 137 + 1511 = 1648
- 149 + 1499 = 1648
- 167 + 1481 = 1648
Showing the first eight; more decompositions exist.
UTF-8 encoding: D9 B0 (2 bytes).
As an unsigned 32-bit integer, this is the IPv4 address 0.0.6.112.
- Address
- 0.0.6.112
- Class
- reserved
- IPv4-mapped IPv6
- ::ffff:0.0.6.112
Unspecified address (0.0.0.0/8) — "this network" placeholder.
The digit sequence 1648 first appears in π at position 13,446 of the decimal expansion (the 13,446ordinal-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.