1,978
1,978 is a composite number, even, a calendar year.
Notable events — 1978 AD
- May 9 Italian Red Brigades dump the body of kidnapped former PM Aldo Moro in Rome.
- Jul 25 Louise Brown, the world's first IVF baby, is born in England.
- Sep 17 Egypt and Israel sign the Camp David Accords.
- Oct 16 Karol Wojtyla is elected Pope John Paul II, the first non-Italian pope in 455 years.
- Nov 18 Over 900 die in a mass murder-suicide at Jonestown, Guyana.
Events compiled from Wikipedia ↗ · Licensed CC BY-SA 4.0
Year facts
- Year type
-
Common year
Standard 365-day year; not divisible by 4 (or divisible by 100 but not 400).
- Days in year
- 365
- ISO weeks
- 52
- Started on
-
Sunday
January 1, 1978
- Ended on
-
Sunday
December 31, 1978
- Friday the 13ths
-
2
2 Friday the 13ths this year.
- Easter Sunday
-
March 26
Sunday, March 26, 1978
- Decade
-
1970s
1970–1979
- Century
-
20th century
1901–2000
- Millennium
-
2nd millennium
1001–2000
- Years ago
-
48
48 years before 2026.
- FIFA World Cup
-
Yes
Men's FIFA World Cup is held every four years (skipped 1942 and 1946 due to WWII).
In other calendars
- Hebrew
-
5738 / 5739 AM
Rosh Hashanah falls in September/October.
- Islamic Hijri
-
1398 / 1399 AH
Lunar calendar; year spans differ from Gregorian.
- Chinese
-
Year of the zodiac:Earth zodiac:Horse
Sexagenary cycle position 55 of 60. Lunar new year falls in late January / mid-February.
- Buddhist Era
-
2521 BE
Counted from the parinirvana of the Buddha (Theravada / Thai / Sri Lankan convention).
- Persian Solar Hijri
-
1356 / 1357 SH
Iranian calendar; Nowruz (new year) falls on the spring equinox.
- Ethiopian
-
1970 / 1971 ET
Year boundary at Enkutatash (September 11/12).
- Indian National (Saka)
-
1900 / 1899 Saka
Indian national calendar; year starts in March.
- Japanese
-
Shōwa 53
Reign-era counting from the start of each emperor's reign.
Properties
- Parity
- Even
- Digit count
- 4
- Digit sum
- 25
- Digit product
- 504
- Digital root
- 7
- Palindrome
- No
- Bit width
- 11 bits
- Reversed
- 8,791
- Recamán's sequence
- a(3,795) = 1,978
- Square (n²)
- 3,912,484
- Cube (n³)
- 7,738,893,352
- Divisor count
- 8
- σ(n) — sum of divisors
- 3,168
- φ(n) — Euler's totient
- 924
- Sum of prime factors
- 68
Primality
Prime factorization: 2 × 23 × 43
Divisors & multiples
Sums & aliquot sequence
Representations
- In words
- one thousand nine hundred seventy-eight
- Ordinal
- 1978th
- Roman numeral
- MCMLXXVIII
- Binary
- 11110111010
- Octal
- 3672
- Hexadecimal
- 0x7BA
- Base64
- B7o=
- One's complement
- 63,557 (16-bit)
Historical numeral systems
- Babylonian (base 60)
- 𒌋𒌋𒌋𒁹𒁹 𒌋𒌋𒌋𒌋𒌋𒁹𒁹𒁹𒁹𒁹𒁹𒁹𒁹
- Egyptian hieroglyphic
- 𓆼𓍢𓍢𓍢𓍢𓍢𓍢𓍢𓍢𓍢𓎆𓎆𓎆𓎆𓎆𓎆𓎆𓏺𓏺𓏺𓏺𓏺𓏺𓏺𓏺
- Greek (Milesian)
- ͵αϡοηʹ
- Mayan (base 20)
- 𝋤·𝋲·𝋲
- Chinese
- 一千九百七十八
- Chinese (financial)
- 壹仟玖佰柒拾捌
Digit at this position in famous constants
- π — Pi (π)
- Digit 1,978 = 2
- e — Euler's number (e)
- Digit 1,978 = 8
- φ — Golden ratio (φ)
- Digit 1,978 = 9
- √2 — Pythagoras's (√2)
- Digit 1,978 = 5
- ln 2 — Natural log of 2
- Digit 1,978 = 9
- γ — Euler-Mascheroni (γ)
- Digit 1,978 = 2
Also seen as
Goldbach's conjecture says every even integer greater than 2 is the sum of two primes. For 1978, here are decompositions:
- 5 + 1973 = 1978
- 29 + 1949 = 1978
- 47 + 1931 = 1978
- 71 + 1907 = 1978
- 89 + 1889 = 1978
- 101 + 1877 = 1978
- 107 + 1871 = 1978
- 131 + 1847 = 1978
Showing the first eight; more decompositions exist.
As an unsigned 32-bit integer, this is the IPv4 address 0.0.7.186.
- Address
- 0.0.7.186
- Class
- reserved
- IPv4-mapped IPv6
- ::ffff:0.0.7.186
Unspecified address (0.0.0.0/8) — "this network" placeholder.
The digit sequence 1978 first appears in π at position 17,317 of the decimal expansion (the 17,317ordinal-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.