298
298 is a composite number, even, a calendar year.
298 (two hundred ninety-eight) is an even 3-digit number. It is a composite number with 4 divisors, and factors as 2 × 149. Written other ways, in Roman numerals it is CCXCVIII and in binary, 100101010.
Interestingness
Historical context — 298 AD
Calendar year
Year 298 (CCXCVIII) was a common year starting on Saturday of the Julian calendar.
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Historical context — 298 BC
Calendar year
Year 298 BC was a year of the pre-Julian Roman 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
- 52
- Started on
-
Saturday
January 1, 298
- Ended on
-
Saturday
December 31, 298
- Friday the 13ths
-
1
One Friday the 13th this year.
- Decade
-
290s
290–299
- Century
-
3rd century
201–300
- Millennium
-
1st millennium
1–1000
- Years ago
-
1,728
1728 years before 2026.
In other calendars
- Hebrew
-
4058 / 4059 AM
Rosh Hashanah falls in September/October.
- 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
-
841 BE
Counted from the parinirvana of the Buddha (Theravada / Thai / Sri Lankan convention).
- Ethiopian
-
290 / 291 ET
Year boundary at Enkutatash (September 11/12).
- Indian National (Saka)
-
220 / 219 Saka
Indian national calendar; year starts in March.
Properties
Primality
Prime factorization: 2 × 149
Divisors & multiples
Sums & aliquot sequence
Continued fraction of √n
√298 = [17; (3, 1, 4, 5, 1, 1, 5, 4, 1, 3, 34)]
Period length 11 — the block in parentheses repeats forever.
Representations
- In words
- two hundred ninety-eight
- Ordinal
- 298th
- Roman numeral
- CCXCVIII
- Binary
- 100101010
- Octal
- 452
- Hexadecimal
- 0x12A
- Base64
- ASo=
- One's complement
- 65,237 (16-bit)
- Scientific notation
- 2.98 × 10²
- As a duration
- 298 s = 4 minutes, 58 seconds
As an angle
Historical numeral systems
- Babylonian (base 60)
- 𒁹𒁹𒁹𒁹 𒌋𒌋𒌋𒌋𒌋𒁹𒁹𒁹𒁹𒁹𒁹𒁹𒁹
- Egyptian hieroglyphic
- 𓍢𓍢𓎆𓎆𓎆𓎆𓎆𓎆𓎆𓎆𓎆𓏺𓏺𓏺𓏺𓏺𓏺𓏺𓏺
- Greek (Milesian)
- σϟηʹ
- Mayan (base 20)
- 𝋮·𝋲
- Chinese
- 二百九十八
- Chinese (financial)
- 貳佰玖拾捌
Digit at this position in famous constants
- π — Pi (π)
- Digit 298 = 1
- e — Euler's number (e)
- Digit 298 = 2
- φ — Golden ratio (φ)
- Digit 298 = 5
- √2 — Pythagoras's (√2)
- Digit 298 = 7
- ln 2 — Natural log of 2
- Digit 298 = 3
- γ — Euler-Mascheroni (γ)
- Digit 298 = 1
Also seen as
Goldbach's conjecture says every even integer greater than 2 is the sum of two primes. For 298, here are decompositions:
- 5 + 293 = 298
- 17 + 281 = 298
- 29 + 269 = 298
- 41 + 257 = 298
- 47 + 251 = 298
- 59 + 239 = 298
- 71 + 227 = 298
- 101 + 197 = 298
Showing the first eight; more decompositions exist.
UTF-8 encoding: C4 AA (2 bytes).
As an unsigned 32-bit integer, this is the IPv4 address 0.0.1.42.
- Address
- 0.0.1.42
- Class
- reserved
- IPv4-mapped IPv6
- ::ffff:0.0.1.42
Unspecified address (0.0.0.0/8) — "this network" placeholder.
Heard as a frequency, 298 Hz is closest to:
- Concert pitch (A4 = 440 Hz): D4 (293.7 Hz, +25¢)
- Scientific pitch (C4 = 256 Hz): D♯4 (304.4 Hz, -37¢)
- Baroque pitch (A4 = 415 Hz): D♯4 (293.4 Hz, +27¢)
Related reading
- Egyptian hieroglyphic numerals — Seven hieroglyphs for every power of ten, from a single stroke to a million.