26
26 is a composite number, even, a calendar year.
Historical context — 26 AD
Calendar year
AD 26 (XXVI) was a common year starting on Tuesday of the Julian calendar, the 26th Year of the Anno Domini (AD) designation, the 26th year of the 1st millennium, the 26th year of the 1st century, and the 6th year of the 3rd decade.
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Historical context — 26 BC
Calendar year
Year 26 BC was either a common year starting on Tuesday or Wednesday or a leap year starting on Monday, Tuesday or Wednesday of the Julian calendar and a common year starting on Monday of the Proleptic 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, 26
- Ended on
-
Thursday
December 31, 26
- Friday the 13ths
-
3
3 Friday the 13ths this year.
- Decade
-
20s
20–29
- Century
-
1st century
1–100
- Millennium
-
1st millennium
1–1000
- Years ago
-
2,000
2000 years before 2026.
In other calendars
- Hebrew
-
3786 / 3787 AM
Rosh Hashanah falls in September/October.
- Chinese
-
Year of the zodiac:Fire zodiac:Dog
Sexagenary cycle position 23 of 60. Lunar new year falls in late January / mid-February.
- Buddhist Era
-
569 BE
Counted from the parinirvana of the Buddha (Theravada / Thai / Sri Lankan convention).
- Ethiopian
-
18 / 19 ET
Year boundary at Enkutatash (September 11/12).
- Indian National (Saka)
-
-52 / -53 Saka
Indian national calendar; year starts in March.
Cultural significance
Gematria value of יהוה (YHWH) — the Tetragrammaton, name of God.
10 + 5 + 6 + 5 = 26.
Sourced from Wikipedia (Numerology, Chinese numerology, Gematria, and per-culture articles).
Properties
Primality
Prime factorization: 2 × 13
Divisors & multiples
Sums & aliquot sequence
Continued fraction of √n
√26 = [5; (10)]
Period length 1 — the block in parentheses repeats forever.
Representations
- In words
- twenty-six
- Ordinal
- 26th
- Roman numeral
- XXVI
- Binary
- 11010
- Octal
- 32
- Hexadecimal
- 0x1A
- Base64
- Gg==
- One's complement
- 229 (8-bit)
- Scientific notation
- 2.6 × 10¹
Historical numeral systems
- Babylonian (base 60)
- 𒌋𒌋𒁹𒁹𒁹𒁹𒁹𒁹
- Egyptian hieroglyphic
- 𓎆𓎆𓏺𓏺𓏺𓏺𓏺𓏺
- Greek (Milesian)
- κϛʹ
- Mayan (base 20)
- 𝋡·𝋦
- Chinese
- 二十六
- Chinese (financial)
- 貳拾陸
Digit at this position in famous constants
- π — Pi (π)
- Digit 26 = 3
- e — Euler's number (e)
- Digit 26 = 4
- φ — Golden ratio (φ)
- Digit 26 = 8
- √2 — Pythagoras's (√2)
- Digit 26 = 7
- ln 2 — Natural log of 2
- Digit 26 = 1
- γ — Euler-Mascheroni (γ)
- Digit 26 = 0
Also seen as
Goldbach's conjecture says every even integer greater than 2 is the sum of two primes. For 26, here are decompositions:
- 3 + 23 = 26
- 7 + 19 = 26
- 13 + 13 = 26
As an ASCII codepoint, 26 is control character (0x1A). ASCII control character.
As an unsigned 32-bit integer, this is the IPv4 address 0.0.0.26.
- Address
- 0.0.0.26
- Class
- reserved
- IPv4-mapped IPv6
- ::ffff:0.0.0.26
Unspecified address (0.0.0.0/8) — "this network" placeholder.
Matches numbered highway designation:
- I-26 — Kingsport, TN to Charleston, SC.
This passes the ABA routing number checksum and matches the Federal Reserve numbering scheme.
Banks operate many routing numbers per state and division; an unmatched checksum-valid number can still be a real RTN at a smaller institution.
Heard as a frequency, 26 Hz is closest to:
- Concert pitch (A4 = 440 Hz): G♯0 (+3¢)
- Scientific pitch (C4 = 256 Hz): G♯0 (+41¢)