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Number

88

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

Abundant Number Flippable Odious Number Palindrome Pernicious Number Practical Number Recamán's Sequence Repdigit Semiperfect Number Strobogrammatic Year

Historical context — 88 AD

Calendar year

AD 88 (LXXXVIII) was a leap year starting on Tuesday of the Julian calendar.

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

Historical context — 88 BC

Calendar year

Year 88 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: 53
Long year: contains 53 ISO weeks.
Started on: Thursday
January 1, 88
Ended on: Friday
December 31, 88
Friday the 13ths: 2
2 Friday the 13ths this year.
Decade: 80s
80–89
Century: 1st century
1–100
Millennium: 1st millennium
1–1000
Years ago: 1,938
1938 years before 2026.

In other calendars

Hebrew: 3848 / 3849 AM
Rosh Hashanah falls in September/October.
Chinese: Year of the zodiac:Earth zodiac:Rat
Sexagenary cycle position 25 of 60. Lunar new year falls in late January / mid-February.
Buddhist Era: 631 BE
Counted from the parinirvana of the Buddha (Theravada / Thai / Sri Lankan convention).
Ethiopian: 80 / 81 ET
Year boundary at Enkutatash (September 11/12).
Indian National (Saka): 10 / 9 Saka
Indian national calendar; year starts in March.

Properties

Parity: Even
Digit count: 2
Digit sum: 16
Digit product: 64
Digital root: 7
Palindrome: Yes
Bit width: 7 bits
Recamán's sequence: a(59) = 88
Square (n²): 7,744
Cube (n³): 681,472
Divisor count: 8
σ(n) — sum of divisors: 180
φ(n) — Euler's totient: 40
Sum of prime factors: 17

Primality

Prime factorization: 2 ³ × 11

Nearest primes: 83 (−5) · 89 (+1)

Divisors & multiples

All divisors (8)

1 · 2 · 4 · 8 · 11 · 22 · 44 (half) · 88

Aliquot sum (sum of proper divisors): 92

Factor pairs (a × b = 88)

1 × 88

2 × 44

4 × 22

8 × 11

First multiples

88 · 176 (double) · 264 · 352 · 440 · 528 · 616 · 704 · 792 · 880

Sums & aliquot sequence

As consecutive integers: 3 + 4 + … + 13

Aliquot sequence: 88 → 92 → 76 → 64 → 63 → 41 → 1 → 0 — terminates at zero

Representations

In words: eighty-eight
Ordinal: 88th
Roman numeral: LXXXVIII
Binary: 1011000
Octal: 130
Hexadecimal: 0x58
Base64: WA==
One's complement: 167 (8-bit)

In other bases

ternary (3) 10021

quaternary (4) 1120

quinary (5) 323

senary (6) 224

septenary (7) 154

nonary (9) 107

undecimal (11) 80

duodecimal (12) 74

tridecimal (13) 6a

tetradecimal (14) 64

pentadecimal (15) 5d

Historical numeral systems

Babylonian (base 60): 𒁹 𒌋𒌋𒁹𒁹𒁹𒁹𒁹𒁹𒁹𒁹
Egyptian hieroglyphic: 𓎆𓎆𓎆𓎆𓎆𓎆𓎆𓎆𓏺𓏺𓏺𓏺𓏺𓏺𓏺𓏺
Greek (Milesian): πηʹ
Mayan (base 20): 𝋤·𝋨
Chinese: 八十八
Chinese (financial): 捌拾捌

In other modern scripts

Eastern Arabic ٨٨ Devanagari ८८ Bengali ৮৮ Tamil ௮௮ Thai ๘๘ Tibetan ༨༨ Khmer ៨៨ Lao ໘໘ Burmese ၈၈

Digit at this position in famous constants

π — Pi (π): Digit 88 = 4
e — Euler's number (e): Digit 88 = 2
φ — Golden ratio (φ): Digit 88 = 7
√2 — Pythagoras's (√2): Digit 88 = 7
ln 2 — Natural log of 2: Digit 88 = 3
γ — Euler-Mascheroni (γ): Digit 88 = 7

Also seen as

Goldbach decomposition

Goldbach's conjecture says every even integer greater than 2 is the sum of two primes. For 88, here are decompositions:

5 + 83 = 88
17 + 71 = 88
29 + 59 = 88
41 + 47 = 88

ASCII character

As an ASCII codepoint, 88 is X. Printable ASCII character X.

Hex color

#000058

RGB(0, 0, 88)

IPv4 address

As an unsigned 32-bit integer, this is the IPv4 address 0.0.0.88.

Address: 0.0.0.88
Class: reserved
IPv4-mapped IPv6: ::ffff:0.0.0.88

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

US numbered highway

Matches numbered highway designation:

I-88 — Two segments: Schenectady, NY and Chicago, IL→Rock Island.

Interstate 88 on Wikipedia ↗