Number

118

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

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

Historical context — 118 AD

Calendar year

Year 118 (CXVIII) 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 — 118 BC

Calendar year

Year 118 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, 118
Ended on: Saturday
December 31, 118
Friday the 13ths: 1
One Friday the 13th this year.
Decade: 110s
110–119
Century: 2nd century
101–200
Millennium: 1st millennium
1–1000
Years ago: 1,908
1908 years before 2026.

In other calendars

Hebrew: 3878 / 3879 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: 661 BE
Counted from the parinirvana of the Buddha (Theravada / Thai / Sri Lankan convention).
Ethiopian: 110 / 111 ET
Year boundary at Enkutatash (September 11/12).
Indian National (Saka): 40 / 39 Saka
Indian national calendar; year starts in March.

Properties

Parity: Even
Digit count: 3
Digit sum: 10
Digit product: 8
Digital root: 1
Palindrome: No
Bit width: 7 bits
Reversed: 811
Flips to (rotate 180°): 811
Recamán's sequence: a(164) = 118
Square (n²): 13,924
Cube (n³): 1,643,032
Divisor count: 4
σ(n) — sum of divisors: 180
φ(n) — Euler's totient: 58
Sum of prime factors: 61

Primality

Prime factorization: 2 × 59

Nearest primes: 113 (−5) · 127 (+9)

Divisors & multiples

All divisors (4)

1 · 2 · 59 (half) · 118

Aliquot sum (sum of proper divisors): 62

Factor pairs (a × b = 118)

1 × 118

2 × 59

First multiples

118 · 236 (double) · 354 · 472 · 590 · 708 · 826 · 944 · 1,062 · 1,180

Sums & aliquot sequence

As consecutive integers: 28 + 29 + 30 + 31

Aliquot sequence: 118 → 62 → 34 → 20 → 22 → 14 → 10 → 8 → 7 → 1 → 0 — terminates at zero

Representations

In words: one hundred eighteen
Ordinal: 118th
Roman numeral: CXVIII
Binary: 1110110
Octal: 166
Hexadecimal: 0x76
Base64: dg==
One's complement: 137 (8-bit)

In other bases

ternary (3) 11101

quaternary (4) 1312

quinary (5) 433

senary (6) 314

septenary (7) 226

nonary (9) 141

undecimal (11) a8

duodecimal (12) 9a

tridecimal (13) 91

tetradecimal (14) 86

pentadecimal (15) 7d

Historical numeral systems

Babylonian (base 60): 𒁹 𒌋𒌋𒌋𒌋𒌋𒁹𒁹𒁹𒁹𒁹𒁹𒁹𒁹
Egyptian hieroglyphic: 𓍢𓎆𓏺𓏺𓏺𓏺𓏺𓏺𓏺𓏺
Greek (Milesian): ριηʹ
Mayan (base 20): 𝋥·𝋲
Chinese: 一百一十八
Chinese (financial): 壹佰壹拾捌

In other modern scripts

Eastern Arabic ١١٨ Devanagari ११८ Bengali ১১৮ Tamil ௧௧௮ Thai ๑๑๘ Tibetan ༡༡༨ Khmer ១១៨ Lao ໑໑໘ Burmese ၁၁၈

Digit at this position in famous constants

π — Pi (π): Digit 118 = 6
e — Euler's number (e): Digit 118 = 9
φ — Golden ratio (φ): Digit 118 = 1
√2 — Pythagoras's (√2): Digit 118 = 7
ln 2 — Natural log of 2: Digit 118 = 5
γ — Euler-Mascheroni (γ): Digit 118 = 2

Also seen as

Goldbach decomposition

Goldbach's conjecture says every even integer greater than 2 is the sum of two primes. For 118, here are decompositions:

5 + 113 = 118
11 + 107 = 118
17 + 101 = 118
29 + 89 = 118
47 + 71 = 118
59 + 59 = 118

ASCII character

As an ASCII codepoint, 118 is v. Printable ASCII character v.

Hex color

#000076

RGB(0, 0, 118)

IPv4 address

As an unsigned 32-bit integer, this is the IPv4 address 0.0.0.118.

Address: 0.0.0.118
Class: reserved
IPv4-mapped IPv6: ::ffff:0.0.0.118

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