1,198
1,198 is a composite number, even, a calendar year.
Historical context — 1198 AD
Calendar year
Year 1198 (MCXCVIII) was a common year starting on Thursday of the Julian calendar.
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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, 1198
- Ended on
-
Thursday
December 31, 1198
- Friday the 13ths
-
3
3 Friday the 13ths this year.
- Decade
-
1190s
1190–1199
- Century
-
12th century
1101–1200
- Millennium
-
2nd millennium
1001–2000
- Years ago
-
828
828 years before 2026.
In other calendars
- Hebrew
-
4958 / 4959 AM
Rosh Hashanah falls in September/October.
- Islamic Hijri
-
594 / 595 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
-
1741 BE
Counted from the parinirvana of the Buddha (Theravada / Thai / Sri Lankan convention).
- Persian Solar Hijri
-
576 / 577 SH
Iranian calendar; Nowruz (new year) falls on the spring equinox.
- Ethiopian
-
1190 / 1191 ET
Year boundary at Enkutatash (September 11/12).
- Indian National (Saka)
-
1120 / 1119 Saka
Indian national calendar; year starts in March.
Properties
- Parity
- Even
- Digit count
- 4
- Digit sum
- 19
- Digit product
- 72
- Digital root
- 1
- Palindrome
- No
- Bit width
- 11 bits
- Reversed
- 8,911
- Flips to (rotate 180°)
- 8,611
- Recamán's sequence
- a(8,592) = 1,198
- Square (n²)
- 1,435,204
- Cube (n³)
- 1,719,374,392
- Divisor count
- 4
- σ(n) — sum of divisors
- 1,800
- φ(n) — Euler's totient
- 598
- Sum of prime factors
- 601
Primality
Prime factorization: 2 × 599
Divisors & multiples
Sums & aliquot sequence
Representations
- In words
- one thousand one hundred ninety-eight
- Ordinal
- 1198th
- Roman numeral
- MCXCVIII
- Binary
- 10010101110
- Octal
- 2256
- Hexadecimal
- 0x4AE
- Base64
- BK4=
- One's complement
- 64,337 (16-bit)
Historical numeral systems
- Babylonian (base 60)
- 𒌋𒁹𒁹𒁹𒁹𒁹𒁹𒁹𒁹𒁹 𒌋𒌋𒌋𒌋𒌋𒁹𒁹𒁹𒁹𒁹𒁹𒁹𒁹
- Egyptian hieroglyphic
- 𓆼𓍢𓎆𓎆𓎆𓎆𓎆𓎆𓎆𓎆𓎆𓏺𓏺𓏺𓏺𓏺𓏺𓏺𓏺
- Greek (Milesian)
- ͵αρϟηʹ
- Mayan (base 20)
- 𝋢·𝋳·𝋲
- Chinese
- 一千一百九十八
- Chinese (financial)
- 壹仟壹佰玖拾捌
Digit at this position in famous constants
- π — Pi (π)
- Digit 1,198 = 4
- e — Euler's number (e)
- Digit 1,198 = 6
- φ — Golden ratio (φ)
- Digit 1,198 = 4
- √2 — Pythagoras's (√2)
- Digit 1,198 = 5
- ln 2 — Natural log of 2
- Digit 1,198 = 6
- γ — Euler-Mascheroni (γ)
- Digit 1,198 = 8
Also seen as
Goldbach's conjecture says every even integer greater than 2 is the sum of two primes. For 1198, here are decompositions:
- 5 + 1193 = 1198
- 11 + 1187 = 1198
- 17 + 1181 = 1198
- 47 + 1151 = 1198
- 89 + 1109 = 1198
- 101 + 1097 = 1198
- 107 + 1091 = 1198
- 137 + 1061 = 1198
Showing the first eight; more decompositions exist.
UTF-8 encoding: D2 AE (2 bytes).
As an unsigned 32-bit integer, this is the IPv4 address 0.0.4.174.
- Address
- 0.0.4.174
- Class
- reserved
- IPv4-mapped IPv6
- ::ffff:0.0.4.174
Unspecified address (0.0.0.0/8) — "this network" placeholder.
The digit sequence 1198 first appears in π at position 1,534 of the decimal expansion (the 1,534ordinal-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.