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Number

387

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

Deficient Number Evil Number Recamán's Sequence Year

Historical context — 387 AD

Calendar year

Year 387 (CCCLXXXVII) was a common year starting on Friday of the Julian calendar.

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Historical context — 387 BC

Calendar year

Year 387 BC was a year of the pre-Julian Roman 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, 387
Ended on: Thursday
December 31, 387
Friday the 13ths: 3
3 Friday the 13ths this year.
Decade: 380s
380–389
Century: 4th century
301–400
Millennium: 1st millennium
1–1000
Years ago: 1,639
1639 years before 2026.

In other calendars

Hebrew: 4147 / 4148 AM
Rosh Hashanah falls in September/October.
Chinese: Year of the zodiac:Fire zodiac:Pig
Sexagenary cycle position 24 of 60. Lunar new year falls in late January / mid-February.
Buddhist Era: 930 BE
Counted from the parinirvana of the Buddha (Theravada / Thai / Sri Lankan convention).
Ethiopian: 379 / 380 ET
Year boundary at Enkutatash (September 11/12).
Indian National (Saka): 309 / 308 Saka
Indian national calendar; year starts in March.

Properties

Parity: Odd
Digit count: 3
Digit sum: 18
Digit product: 168
Digital root: 9
Palindrome: No
Bit width: 9 bits
Reversed: 783
Recamán's sequence: a(2,478) = 387
Square (n²): 149,769
Cube (n³): 57,960,603
Divisor count: 6
σ(n) — sum of divisors: 572
φ(n) — Euler's totient: 252
Sum of prime factors: 49

Primality

Prime factorization: 3 ² × 43

Nearest primes: 383 (−4) · 389 (+2)

Divisors & multiples

All divisors (6)

1 · 3 · 9 · 43 · 129 · 387

Aliquot sum (sum of proper divisors): 185

Factor pairs (a × b = 387)

1 × 387

3 × 129

9 × 43

First multiples

387 · 774 (double) · 1,161 · 1,548 · 1,935 · 2,322 · 2,709 · 3,096 · 3,483 · 3,870

Sums & aliquot sequence

As consecutive integers: 193 + 194 128 + 129 + 130 62 + 63 + 64 + 65 + 66 + 67 39 + 40 + … + 47

Aliquot sequence: 387 → 185 → 43 → 1 → 0 — terminates at zero

Representations

In words: three hundred eighty-seven
Ordinal: 387th
Roman numeral: CCCLXXXVII
Binary: 110000011
Octal: 603
Hexadecimal: 0x183
Base64: AYM=
One's complement: 65,148 (16-bit)

In other bases

ternary (3) 112100

quaternary (4) 12003

quinary (5) 3022

senary (6) 1443

septenary (7) 1062

nonary (9) 470

undecimal (11) 322

duodecimal (12) 283

tridecimal (13) 23a

tetradecimal (14) 1d9

pentadecimal (15) 1ac

Historical numeral systems

Babylonian (base 60): 𒁹𒁹𒁹𒁹𒁹𒁹 𒌋𒌋𒁹𒁹𒁹𒁹𒁹𒁹𒁹
Egyptian hieroglyphic: 𓍢𓍢𓍢𓎆𓎆𓎆𓎆𓎆𓎆𓎆𓎆𓏺𓏺𓏺𓏺𓏺𓏺𓏺
Greek (Milesian): τπζʹ
Mayan (base 20): 𝋳·𝋧
Chinese: 三百八十七
Chinese (financial): 參佰捌拾柒

In other modern scripts

Eastern Arabic ٣٨٧ Devanagari ३८७ Bengali ৩৮৭ Tamil ௩௮௭ Thai ๓๘๗ Tibetan ༣༨༧ Khmer ៣៨៧ Lao ໓໘໗ Burmese ၃၈၇

Digit at this position in famous constants

π — Pi (π): Digit 387 = 4
e — Euler's number (e): Digit 387 = 9
φ — Golden ratio (φ): Digit 387 = 6
√2 — Pythagoras's (√2): Digit 387 = 7
ln 2 — Natural log of 2: Digit 387 = 7
γ — Euler-Mascheroni (γ): Digit 387 = 7

Also seen as

Unicode codepoint

ƃ

Latin Small Letter B With Topbar

U+0183

Lowercase letter (Ll)

UTF-8 encoding: C6 83 (2 bytes).

Lookup U+0183 on Compart ↗ Lookup on FileFormat.Info ↗

Hex color

#000183

RGB(0, 1, 131)

IPv4 address

As an unsigned 32-bit integer, this is the IPv4 address 0.0.1.131.

Address: 0.0.1.131
Class: reserved
IPv4-mapped IPv6: ::ffff:0.0.1.131

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