1,904
1,904 is a composite number, even, a calendar year.
Notable events — 1904 AD
- Feb 8 Japan attacks Russian-held Port Arthur, beginning the Russo-Japanese War.
- Apr 8 Britain and France sign the Entente Cordiale.
- Apr 30 The Louisiana Purchase Exposition opens in St. Louis.
- Jul 21 The Trans-Siberian Railway is completed.
- Oct 27 The first underground line of the New York subway opens.
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, 1904
- Ended on
-
Saturday
December 31, 1904
- Friday the 13ths
-
1
One Friday the 13th this year.
- Easter Sunday
-
April 3
Sunday, April 3, 1904
- Decade
-
1900s
1900–1909
- Century
-
20th century
1901–2000
- Millennium
-
2nd millennium
1001–2000
- Years ago
-
122
122 years before 2026.
- US presidential election
-
Yes
US holds a presidential election in years divisible by 4 starting from 1788.
- Summer Olympics
- Yes
In other calendars
- Hebrew
-
5664 / 5665 AM
Rosh Hashanah falls in September/October.
- Islamic Hijri
-
1321 / 1322 AH
Lunar calendar; year spans differ from Gregorian.
- Chinese
-
Year of the zodiac:Wood zodiac:Dragon
Sexagenary cycle position 41 of 60. Lunar new year falls in late January / mid-February.
- Buddhist Era
-
2447 BE
Counted from the parinirvana of the Buddha (Theravada / Thai / Sri Lankan convention).
- Persian Solar Hijri
-
1282 / 1283 SH
Iranian calendar; Nowruz (new year) falls on the spring equinox.
- Ethiopian
-
1896 / 1897 ET
Year boundary at Enkutatash (September 11/12).
- Indian National (Saka)
-
1826 / 1825 Saka
Indian national calendar; year starts in March.
- Japanese
-
Meiji 37
Reign-era counting from the start of each emperor's reign.
Properties
Primality
Prime factorization: 2 4 × 7 × 17
Divisors & multiples
Sums & aliquot sequence
Representations
- In words
- one thousand nine hundred four
- Ordinal
- 1904th
- Roman numeral
- MCMIV
- Binary
- 11101110000
- Octal
- 3560
- Hexadecimal
- 0x770
- Base64
- B3A=
- One's complement
- 63,631 (16-bit)
Historical numeral systems
- Babylonian (base 60)
- 𒌋𒌋𒌋𒁹 𒌋𒌋𒌋𒌋𒁹𒁹𒁹𒁹
- Egyptian hieroglyphic
- 𓆼𓍢𓍢𓍢𓍢𓍢𓍢𓍢𓍢𓍢𓏺𓏺𓏺𓏺
- Greek (Milesian)
- ͵αϡδʹ
- Mayan (base 20)
- 𝋤·𝋯·𝋤
- Chinese
- 一千九百零四
- Chinese (financial)
- 壹仟玖佰零肆
Digit at this position in famous constants
- π — Pi (π)
- Digit 1,904 = 7
- e — Euler's number (e)
- Digit 1,904 = 7
- φ — Golden ratio (φ)
- Digit 1,904 = 1
- √2 — Pythagoras's (√2)
- Digit 1,904 = 2
- ln 2 — Natural log of 2
- Digit 1,904 = 2
- γ — Euler-Mascheroni (γ)
- Digit 1,904 = 2
Also seen as
Goldbach's conjecture says every even integer greater than 2 is the sum of two primes. For 1904, here are decompositions:
- 3 + 1901 = 1904
- 31 + 1873 = 1904
- 37 + 1867 = 1904
- 43 + 1861 = 1904
- 73 + 1831 = 1904
- 103 + 1801 = 1904
- 127 + 1777 = 1904
- 151 + 1753 = 1904
Showing the first eight; more decompositions exist.
UTF-8 encoding: DD B0 (2 bytes).
As an unsigned 32-bit integer, this is the IPv4 address 0.0.7.112.
- Address
- 0.0.7.112
- Class
- reserved
- IPv4-mapped IPv6
- ::ffff:0.0.7.112
Unspecified address (0.0.0.0/8) — "this network" placeholder.
The digit sequence 1904 first appears in π at position 22,867 of the decimal expansion (the 22,867ordinal-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.