1,864
1,864 is a composite number, even, a calendar year.
Notable events — 1864 AD
- Nov 8 Lincoln is re-elected, defeating George McClellan.
- Nov 15 Sherman begins his March to the Sea.
- Apr 8 The US Senate passes the 13th Amendment to abolish slavery.
- Aug 22 Twelve nations sign the First Geneva Convention.
- Oct 31 Nevada becomes the 36th US state.
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
- 52
- Started on
-
Friday
January 1, 1864
- Ended on
-
Saturday
December 31, 1864
- Friday the 13ths
-
1
One Friday the 13th this year.
- Easter Sunday
-
March 27
Sunday, March 27, 1864
- Decade
-
1860s
1860–1869
- Century
-
19th century
1801–1900
- Millennium
-
2nd millennium
1001–2000
- Years ago
-
162
162 years before 2026.
- US presidential election
-
Yes
US holds a presidential election in years divisible by 4 starting from 1788.
In other calendars
- Hebrew
-
5624 / 5625 AM
Rosh Hashanah falls in September/October.
- Islamic Hijri
-
1280 / 1281 AH
Lunar calendar; year spans differ from Gregorian.
- Chinese
-
Year of the zodiac:Wood zodiac:Rat
Sexagenary cycle position 1 of 60. Lunar new year falls in late January / mid-February.
- Buddhist Era
-
2407 BE
Counted from the parinirvana of the Buddha (Theravada / Thai / Sri Lankan convention).
- Persian Solar Hijri
-
1242 / 1243 SH
Iranian calendar; Nowruz (new year) falls on the spring equinox.
- Ethiopian
-
1856 / 1857 ET
Year boundary at Enkutatash (September 11/12).
- Indian National (Saka)
-
1786 / 1785 Saka
Indian national calendar; year starts in March.
Properties
- Parity
- Even
- Digit count
- 4
- Digit sum
- 19
- Digit product
- 192
- Digital root
- 1
- Palindrome
- No
- Bit width
- 11 bits
- Reversed
- 4,681
- Recamán's sequence
- a(8,016) = 1,864
- Square (n²)
- 3,474,496
- Cube (n³)
- 6,476,460,544
- Divisor count
- 8
- σ(n) — sum of divisors
- 3,510
- φ(n) — Euler's totient
- 928
- Sum of prime factors
- 239
Primality
Prime factorization: 2 3 × 233
Divisors & multiples
Sums & aliquot sequence
Representations
- In words
- one thousand eight hundred sixty-four
- Ordinal
- 1864th
- Roman numeral
- MDCCCLXIV
- Binary
- 11101001000
- Octal
- 3510
- Hexadecimal
- 0x748
- Base64
- B0g=
- One's complement
- 63,671 (16-bit)
Historical numeral systems
- Babylonian (base 60)
- 𒌋𒌋𒌋𒁹 𒁹𒁹𒁹𒁹
- Egyptian hieroglyphic
- 𓆼𓍢𓍢𓍢𓍢𓍢𓍢𓍢𓍢𓎆𓎆𓎆𓎆𓎆𓎆𓏺𓏺𓏺𓏺
- Greek (Milesian)
- ͵αωξδʹ
- Mayan (base 20)
- 𝋤·𝋭·𝋤
- Chinese
- 一千八百六十四
- Chinese (financial)
- 壹仟捌佰陸拾肆
Digit at this position in famous constants
- π — Pi (π)
- Digit 1,864 = 4
- e — Euler's number (e)
- Digit 1,864 = 1
- φ — Golden ratio (φ)
- Digit 1,864 = 3
- √2 — Pythagoras's (√2)
- Digit 1,864 = 9
- ln 2 — Natural log of 2
- Digit 1,864 = 3
- γ — Euler-Mascheroni (γ)
- Digit 1,864 = 7
Also seen as
Goldbach's conjecture says every even integer greater than 2 is the sum of two primes. For 1864, here are decompositions:
- 3 + 1861 = 1864
- 17 + 1847 = 1864
- 41 + 1823 = 1864
- 53 + 1811 = 1864
- 131 + 1733 = 1864
- 167 + 1697 = 1864
- 197 + 1667 = 1864
- 227 + 1637 = 1864
Showing the first eight; more decompositions exist.
UTF-8 encoding: DD 88 (2 bytes).
As an unsigned 32-bit integer, this is the IPv4 address 0.0.7.72.
- Address
- 0.0.7.72
- Class
- reserved
- IPv4-mapped IPv6
- ::ffff:0.0.7.72
Unspecified address (0.0.0.0/8) — "this network" placeholder.
The digit sequence 1864 first appears in π at position 2,989 of the decimal expansion (the 2,989ordinal-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.