Number

260

260 is a composite number, even, a calendar year.

Abundant Number Arithmetic Number Evil Number Gapful Number Pernicious Number Practical Number Recamán's Sequence Semiperfect Number Year

Historical context — 260 AD

Calendar year

Year 260 (CCLX) was a leap year starting on Sunday of the Julian calendar.

Excerpt from Wikipedia (en) ↗ · Licensed CC BY-SA 4.0 · English fallback Read the full article on Wikipedia →

Historical context — 260 BC

Calendar year

Year 260 BC was a year of the pre-Julian Roman calendar.

Excerpt from Wikipedia (en) ↗ · Licensed CC BY-SA 4.0 · English fallback 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: Sunday
January 1, 260
Ended on: Monday
December 31, 260
Friday the 13ths: 3
3 Friday the 13ths this year.
Decade: 260s
260–269
Century: 3rd century
201–300
Millennium: 1st millennium
1–1000
Years ago: 1,766
1766 years before 2026.

In other calendars

Hebrew: 4020 / 4021 AM
Rosh Hashanah falls in September/October.
Chinese: Year of the zodiac:Metal zodiac:Dragon
Sexagenary cycle position 17 of 60. Lunar new year falls in late January / mid-February.
Buddhist Era: 803 BE
Counted from the parinirvana of the Buddha (Theravada / Thai / Sri Lankan convention).
Ethiopian: 252 / 253 ET
Year boundary at Enkutatash (September 11/12).
Indian National (Saka): 182 / 181 Saka
Indian national calendar; year starts in March.

Properties

Parity: Even
Digit count: 3
Digit sum: 8
Digit product: 0
Digital root: 8
Palindrome: No
Bit width: 9 bits
Reversed: 62
Recamán's sequence: a(123) = 260
Square (n²): 67,600
Cube (n³): 17,576,000
Divisor count: 12
σ(n) — sum of divisors: 588
φ(n) — Euler's totient: 96
Sum of prime factors: 22

Primality

Prime factorization: 2 ² × 5 × 13

Nearest primes: 257 (−3) · 263 (+3)

Divisors & multiples

All divisors (12)

1 · 2 · 4 · 5 · 10 · 13 · 20 · 26 · 52 · 65 · 130 (half) · 260

Aliquot sum (sum of proper divisors): 328

Factor pairs (a × b = 260)

1 × 260

2 × 130

4 × 65

5 × 52

10 × 26

13 × 20

First multiples

260 · 520 (double) · 780 · 1,040 · 1,300 · 1,560 · 1,820 · 2,080 · 2,340 · 2,600

Sums & aliquot sequence

As a sum of two squares: 2² + 16² = 8² + 14²

As consecutive integers: 50 + 51 + 52 + 53 + 54 29 + 30 + … + 36 14 + 15 + … + 26

Aliquot sequence: 260 → 328 → 302 → 154 → 134 → 70 → 74 → 40 → 50 → 43 → 1 → 0 — terminates at zero

Representations

In words: two hundred sixty
Ordinal: 260th
Roman numeral: CCLX
Binary: 100000100
Octal: 404
Hexadecimal: 0x104
Base64: AQQ=
One's complement: 65,275 (16-bit)

In other bases

ternary (3) 100122

quaternary (4) 10010

quinary (5) 2020

senary (6) 1112

septenary (7) 521

nonary (9) 318

undecimal (11) 217

duodecimal (12) 198

tridecimal (13) 170

tetradecimal (14) 148

pentadecimal (15) 125

Historical numeral systems

Babylonian (base 60): 𒁹𒁹𒁹𒁹 𒌋𒌋
Egyptian hieroglyphic: 𓍢𓍢𓎆𓎆𓎆𓎆𓎆𓎆
Greek (Milesian): σξʹ
Mayan (base 20): 𝋭·𝋠
Chinese: 二百六十
Chinese (financial): 貳佰陸拾

In other modern scripts

Eastern Arabic ٢٦٠ Devanagari २६० Bengali ২৬০ Tamil ௨௬௦ Thai ๒๖๐ Tibetan ༢༦༠ Khmer ២៦០ Lao ໒໖໐ Burmese ၂၆၀

Digit at this position in famous constants

π — Pi (π): Digit 260 = 9
e — Euler's number (e): Digit 260 = 1
φ — Golden ratio (φ): Digit 260 = 1
√2 — Pythagoras's (√2): Digit 260 = 2
ln 2 — Natural log of 2: Digit 260 = 4
γ — Euler-Mascheroni (γ): Digit 260 = 0

Also seen as

Goldbach decomposition

Goldbach's conjecture says every even integer greater than 2 is the sum of two primes. For 260, here are decompositions:

3 + 257 = 260
19 + 241 = 260
31 + 229 = 260
37 + 223 = 260
61 + 199 = 260
67 + 193 = 260
79 + 181 = 260
97 + 163 = 260

Showing the first eight; more decompositions exist.

Unicode codepoint

Latin Capital Letter A With Ogonek

U+0104

Uppercase letter (Lu)

UTF-8 encoding: C4 84 (2 bytes).

Lookup U+0104 on Compart ↗ Lookup on FileFormat.Info ↗

Hex color

#000104

RGB(0, 1, 4)

IPv4 address

As an unsigned 32-bit integer, this is the IPv4 address 0.0.1.4.

Address: 0.0.1.4
Class: reserved
IPv4-mapped IPv6: ::ffff:0.0.1.4

Unspecified address (0.0.0.0/8) — "this network" placeholder.

NANP area code 260

The number 260 is an active NANP area code (North American Numbering Plan).

Primary area: Fort Wayne
Region: Indiana
Country: United States

Most NANP area codes have multiple overlays in dense regions; the primary area listed is the historic/largest population center for this code.

Look up area code 260 ↗