1,998
1,998 is a composite number, even, a calendar year.
Notable events — 1998 AD
- Feb 7 The Winter Olympics open in Nagano, Japan.
- May 11 India conducts a series of underground nuclear tests (Pokhran-II).
- Aug 7 Simultaneous truck bombs destroy US embassies in Kenya and Tanzania.
- Sep 4 Larry Page and Sergey Brin incorporate Google in Menlo Park, California.
- Dec 19 President Bill Clinton is impeached by the US House of Representatives.
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
-
53
Long year: contains 53 ISO weeks.
- Started on
-
Thursday
January 1, 1998
- Ended on
-
Thursday
December 31, 1998
- Friday the 13ths
-
3
3 Friday the 13ths this year.
- Easter Sunday
-
April 12
Sunday, April 12, 1998
- Decade
-
1990s
1990–1999
- Century
-
20th century
1901–2000
- Millennium
-
2nd millennium
1001–2000
- Years ago
-
28
28 years before 2026.
- FIFA World Cup
-
Yes
Men's FIFA World Cup is held every four years (skipped 1942 and 1946 due to WWII).
- Winter Olympics
-
Yes
Held in even years between Summer Games (2002, 2006, ...).
In other calendars
- Hebrew
-
5758 / 5759 AM
Rosh Hashanah falls in September/October.
- Islamic Hijri
-
1418 / 1419 AH
Lunar calendar; year spans differ from Gregorian.
- Chinese
-
Year of the zodiac:Earth zodiac:Tiger
Sexagenary cycle position 15 of 60. Lunar new year falls in late January / mid-February.
- Buddhist Era
-
2541 BE
Counted from the parinirvana of the Buddha (Theravada / Thai / Sri Lankan convention).
- Persian Solar Hijri
-
1376 / 1377 SH
Iranian calendar; Nowruz (new year) falls on the spring equinox.
- Ethiopian
-
1990 / 1991 ET
Year boundary at Enkutatash (September 11/12).
- Indian National (Saka)
-
1920 / 1919 Saka
Indian national calendar; year starts in March.
- Japanese
-
Heisei 10
Reign-era counting from the start of each emperor's reign.
Properties
- Parity
- Even
- Digit count
- 4
- Digit sum
- 27
- Digit product
- 648
- Digital root
- 9
- Palindrome
- No
- Bit width
- 11 bits
- Reversed
- 8,991
- Flips to (rotate 180°)
- 8,661
- Recamán's sequence
- a(3,755) = 1,998
- Square (n²)
- 3,992,004
- Cube (n³)
- 7,976,023,992
- Divisor count
- 16
- σ(n) — sum of divisors
- 4,560
- φ(n) — Euler's totient
- 648
- Sum of prime factors
- 48
Primality
Prime factorization: 2 × 3 3 × 37
Divisors & multiples
Sums & aliquot sequence
Representations
- In words
- one thousand nine hundred ninety-eight
- Ordinal
- 1998th
- Roman numeral
- MCMXCVIII
- Binary
- 11111001110
- Octal
- 3716
- Hexadecimal
- 0x7CE
- Base64
- B84=
- One's complement
- 63,537 (16-bit)
Historical numeral systems
- Babylonian (base 60)
- 𒌋𒌋𒌋𒁹𒁹𒁹 𒌋𒁹𒁹𒁹𒁹𒁹𒁹𒁹𒁹
- Egyptian hieroglyphic
- 𓆼𓍢𓍢𓍢𓍢𓍢𓍢𓍢𓍢𓍢𓎆𓎆𓎆𓎆𓎆𓎆𓎆𓎆𓎆𓏺𓏺𓏺𓏺𓏺𓏺𓏺𓏺
- Greek (Milesian)
- ͵αϡϟηʹ
- Mayan (base 20)
- 𝋤·𝋳·𝋲
- Chinese
- 一千九百九十八
- Chinese (financial)
- 壹仟玖佰玖拾捌
Digit at this position in famous constants
- π — Pi (π)
- Digit 1,998 = 9
- e — Euler's number (e)
- Digit 1,998 = 8
- φ — Golden ratio (φ)
- Digit 1,998 = 3
- √2 — Pythagoras's (√2)
- Digit 1,998 = 6
- ln 2 — Natural log of 2
- Digit 1,998 = 0
- γ — Euler-Mascheroni (γ)
- Digit 1,998 = 2
Also seen as
Goldbach's conjecture says every even integer greater than 2 is the sum of two primes. For 1998, here are decompositions:
- 5 + 1993 = 1998
- 11 + 1987 = 1998
- 19 + 1979 = 1998
- 47 + 1951 = 1998
- 67 + 1931 = 1998
- 97 + 1901 = 1998
- 109 + 1889 = 1998
- 127 + 1871 = 1998
Showing the first eight; more decompositions exist.
UTF-8 encoding: DF 8E (2 bytes).
As an unsigned 32-bit integer, this is the IPv4 address 0.0.7.206.
- Address
- 0.0.7.206
- Class
- reserved
- IPv4-mapped IPv6
- ::ffff:0.0.7.206
Unspecified address (0.0.0.0/8) — "this network" placeholder.
The digit sequence 1998 first appears in π at position 29,888 of the decimal expansion (the 29,888ordinal-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.