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Number

185

185 is a composite number, odd, a calendar year.

Arithmetic Number Deficient Number Odious Number Pernicious Number Recamán's Sequence Semiprime Squarefree Year

Historical context — 185 AD

Calendar year

Year 185 (CLXXXV) was a common year starting on Friday of the Julian calendar.

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

Historical context — 185 BC

Calendar year

Year 185 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: 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, 185
Ended on: Saturday
December 31, 185
Friday the 13ths: 1
One Friday the 13th this year.
Decade: 180s
180–189
Century: 2nd century
101–200
Millennium: 1st millennium
1–1000
Years ago: 1,841
1841 years before 2026.

In other calendars

Hebrew: 3945 / 3946 AM
Rosh Hashanah falls in September/October.
Chinese: Year of the zodiac:Wood zodiac:Ox
Sexagenary cycle position 2 of 60. Lunar new year falls in late January / mid-February.
Buddhist Era: 728 BE
Counted from the parinirvana of the Buddha (Theravada / Thai / Sri Lankan convention).
Ethiopian: 177 / 178 ET
Year boundary at Enkutatash (September 11/12).
Indian National (Saka): 107 / 106 Saka
Indian national calendar; year starts in March.

Properties

Parity: Odd
Digit count: 3
Digit sum: 14
Digit product: 40
Digital root: 5
Palindrome: No
Bit width: 8 bits
Reversed: 581
Recamán's sequence: a(1,401) = 185
Square (n²): 34,225
Cube (n³): 6,331,625
Divisor count: 4
σ(n) — sum of divisors: 228
φ(n) — Euler's totient: 144
Sum of prime factors: 42

Primality

Prime factorization: 5 × 37

Nearest primes: 181 (−4) · 191 (+6)

Divisors & multiples

All divisors (4)

1 · 5 · 37 · 185

Aliquot sum (sum of proper divisors): 43

Factor pairs (a × b = 185)

1 × 185

5 × 37

First multiples

185 · 370 (double) · 555 · 740 · 925 · 1,110 · 1,295 · 1,480 · 1,665 · 1,850

Sums & aliquot sequence

As a sum of two squares: 4² + 13² = 8² + 11²

As consecutive integers: 92 + 93 35 + 36 + 37 + 38 + 39 14 + 15 + … + 23

Aliquot sequence: 185 → 43 → 1 → 0 — terminates at zero

Representations

In words: one hundred eighty-five
Ordinal: 185th
Roman numeral: CLXXXV
Binary: 10111001
Octal: 271
Hexadecimal: 0xB9
Base64: uQ==
One's complement: 70 (8-bit)

In other bases

ternary (3) 20212

quaternary (4) 2321

quinary (5) 1220

senary (6) 505

septenary (7) 353

nonary (9) 225

undecimal (11) 159

duodecimal (12) 135

tridecimal (13) 113

tetradecimal (14) d3

pentadecimal (15) c5

Historical numeral systems

Babylonian (base 60): 𒁹𒁹𒁹 𒁹𒁹𒁹𒁹𒁹
Egyptian hieroglyphic: 𓍢𓎆𓎆𓎆𓎆𓎆𓎆𓎆𓎆𓏺𓏺𓏺𓏺𓏺
Greek (Milesian): ρπεʹ
Mayan (base 20): 𝋩·𝋥
Chinese: 一百八十五
Chinese (financial): 壹佰捌拾伍

In other modern scripts

Eastern Arabic ١٨٥ Devanagari १८५ Bengali ১৮৫ Tamil ௧௮௫ Thai ๑๘๕ Tibetan ༡༨༥ Khmer ១៨៥ Lao ໑໘໕ Burmese ၁၈၅

Digit at this position in famous constants

π — Pi (π): Digit 185 = 6
e — Euler's number (e): Digit 185 = 8
φ — Golden ratio (φ): Digit 185 = 6
√2 — Pythagoras's (√2): Digit 185 = 5
ln 2 — Natural log of 2: Digit 185 = 6
γ — Euler-Mascheroni (γ): Digit 185 = 7

Also seen as

Unicode codepoint

¹

Superscript One

U+00B9

Other number (No)

UTF-8 encoding: C2 B9 (2 bytes).

Lookup U+00B9 on Compart ↗ Lookup on FileFormat.Info ↗

Hex color

#0000B9

RGB(0, 0, 185)

IPv4 address

As an unsigned 32-bit integer, this is the IPv4 address 0.0.0.185.

Address: 0.0.0.185
Class: reserved
IPv4-mapped IPv6: ::ffff:0.0.0.185

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