548
548 is a composite number, even, a calendar year.
548 (five hundred forty-eight) is an even 3-digit number. It is a composite number with 6 divisors, and factors as 2² × 137. Written other ways, in Roman numerals it is DXLVIII and in binary, 1000100100.
Interestingness
Historical context — 548 AD
Calendar year
Year 548 (DXLVIII) was a leap year starting on Wednesday of the Julian calendar.
Excerpt from Wikipedia (en) ↗ · Licensed CC BY-SA 4.0 Read the full article on Wikipedia →
Historical context — 548 BC
Calendar year
The year 548 BC was a year of the pre-Julian Roman calendar.
Excerpt from Wikipedia (en) ↗ · Licensed CC BY-SA 4.0 Read the full article on Wikipedia →
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
-
Monday
January 1, 548
- Ended on
-
Tuesday
December 31, 548
- Friday the 13ths
-
2
2 Friday the 13ths this year.
- Decade
-
540s
540–549
- Century
-
6th century
501–600
- Millennium
-
1st millennium
1–1000
- Years ago
-
1,478
1478 years before 2026.
In other calendars
- Hebrew
-
4308 / 4309 AM
Rosh Hashanah falls in September/October.
- Chinese
-
Year of the zodiac:Earth zodiac:Dragon
Sexagenary cycle position 5 of 60. Lunar new year falls in late January / mid-February.
- Buddhist Era
-
1091 BE
Counted from the parinirvana of the Buddha (Theravada / Thai / Sri Lankan convention).
- Ethiopian
-
540 / 541 ET
Year boundary at Enkutatash (September 11/12).
- Indian National (Saka)
-
470 / 469 Saka
Indian national calendar; year starts in March.
Properties
Primality
Prime factorization: 2 2 × 137
Divisors & multiples
Sums & aliquot sequence
Continued fraction of √n
√548 = [23; (2, 2, 3, 1, 5, 1, 10, 1, 5, 1, 3, 2, 2, 46)]
Period length 14 — the block in parentheses repeats forever.
Representations
- In words
- five hundred forty-eight
- Ordinal
- 548th
- Roman numeral
- DXLVIII
- Binary
- 1000100100
- Octal
- 1044
- Hexadecimal
- 0x224
- Base64
- AiQ=
- One's complement
- 64,987 (16-bit)
- Scientific notation
- 5.48 × 10²
- As a duration
- 548 s = 9 minutes, 8 seconds
As an angle
Historical numeral systems
- Babylonian (base 60)
- 𒁹𒁹𒁹𒁹𒁹𒁹𒁹𒁹𒁹 𒁹𒁹𒁹𒁹𒁹𒁹𒁹𒁹
- Egyptian hieroglyphic
- 𓍢𓍢𓍢𓍢𓍢𓎆𓎆𓎆𓎆𓏺𓏺𓏺𓏺𓏺𓏺𓏺𓏺
- Greek (Milesian)
- φμηʹ
- Mayan (base 20)
- 𝋡·𝋧·𝋨
- Chinese
- 五百四十八
- Chinese (financial)
- 伍佰肆拾捌
Digit at this position in famous constants
- π — Pi (π)
- Digit 548 = 1
- e — Euler's number (e)
- Digit 548 = 1
- φ — Golden ratio (φ)
- Digit 548 = 7
- √2 — Pythagoras's (√2)
- Digit 548 = 4
- ln 2 — Natural log of 2
- Digit 548 = 5
- γ — Euler-Mascheroni (γ)
- Digit 548 = 9
Also seen as
Goldbach's conjecture says every even integer greater than 2 is the sum of two primes. For 548, here are decompositions:
- 7 + 541 = 548
- 61 + 487 = 548
- 109 + 439 = 548
- 127 + 421 = 548
- 139 + 409 = 548
- 151 + 397 = 548
- 181 + 367 = 548
- 199 + 349 = 548
Showing the first eight; more decompositions exist.
UTF-8 encoding: C8 A4 (2 bytes).
As an unsigned 32-bit integer, this is the IPv4 address 0.0.2.36.
- Address
- 0.0.2.36
- Class
- reserved
- IPv4-mapped IPv6
- ::ffff:0.0.2.36
Unspecified address (0.0.0.0/8) — "this network" placeholder.
The number 548 is an active NANP area code (North American Numbering Plan).
- Primary area
- Southwestern Ontario
- Region
- Ontario
- Country
- Canada
Most NANP area codes have multiple overlays in dense regions; the primary area listed is the historic/largest population center for this code.
Heard as a frequency, 548 Hz is closest to:
- Concert pitch (A4 = 440 Hz): C♯5 (554.4 Hz, -20¢)
- Scientific pitch (C4 = 256 Hz): C♯5 (542.4 Hz, +18¢)
- Baroque pitch (A4 = 415 Hz): D5 (554 Hz, -19¢)
Related reading
- Mayan numerals — Vigesimal dots-and-bars with a shell zero — one of the earliest true zeros.