Live analysis

28,004

28,004 is a composite number, even.

This number doesn't have a permanent NumberWiki page yet — what you see below is computed live. Pages get added to the permanent index when they're notable (years, primes, curated, etc.).

28,004 (twenty-eight thousand four) is an even 5-digit number. It is a composite number with 6 divisors, and factors as 2² × 7,001. Written other ways, in hexadecimal, 0x6D64.

Arithmetic Number Cube-Free Deficient Number Evil Number Recamán's Sequence Self Number

Interestingness

★ ★ ☆ ☆ ☆

4 notable facts · grade D

27,992 27,993 27,994 27,995 27,996 27,997 27,998 27,999 28,000 28,001 28,002 28,003 28,004 28,005 28,006 28,007 28,008 28,009 28,010 28,011 28,012 28,013 28,014 28,015 28,016

less more

Properties

Parity: Even
Digit count: 5
Digit sum: 14
Digit product: 0
Digital root: 5
Palindrome: No
Bit width: 15 bits
Reversed: 40,082
Recamán's sequence: a(34,423) = 28,004
Square (n²): 784,224,016
Cube (n³): 21,961,409,344,064
Divisor count: 6
σ(n) — sum of divisors: 49,014
φ(n) — Euler's totient: 14,000
Sum of prime factors: 7,005

Primality

Prime factorization: 2 ² × 7001

Nearest primes: 28,001 (−3) · 28,019 (+15)

Divisors & multiples

All divisors (6)

1 · 2 · 4 · 7001 · 14002 (half) · 28004

Aliquot sum (sum of proper divisors): 21,010

Factor pairs (a × b = 28,004)

1 × 28004

2 × 14002

4 × 7001

First multiples

28,004 · 56,008 (double) · 84,012 · 112,016 · 140,020 · 168,024 · 196,028 · 224,032 · 252,036 · 280,040

Sums & aliquot sequence

As a sum of two squares: 70² + 152²

As consecutive integers: 3,497 + 3,498 + … + 3,504

Aliquot sequence: 28,004 → 21,010 → 20,462 → 12,634 → 6,320 → 8,560 → 11,528 → 12,232 → 12,968 → 11,362 → 8,798 → 4,810 → 4,766 → 2,386 → 1,196 → 1,156 → 993 — unresolved within range

Continued fraction of √n

√28,004 = [167; (2, 1, 9, 1, 3, 1, 4, 5, 47, 1, 1, 1, 1, 1, 2, 1, 8, 1, 5, 5, 3, 6, 1, 1, …)]

Representations

In words: twenty-eight thousand four
Ordinal: 28004th
Binary: 110110101100100
Octal: 66544
Hexadecimal: 0x6D64
Base64: bWQ=
One's complement: 37,531 (16-bit)
Scientific notation: 2.8004 × 10⁴
As a duration: 28,004 s = 7 hours, 46 minutes, 44 seconds

In other bases

ternary (3) 1102102012

quaternary (4) 12311210

quinary (5) 1344004

senary (6) 333352

septenary (7) 144434

nonary (9) 42365

undecimal (11) 1a049

duodecimal (12) 14258

tridecimal (13) c992

tetradecimal (14) a2c4

pentadecimal (15) 846e

As an angle

28,004° = 77 × 360° + 284°

284° ≈ 4.957 rad

Compass bearing: WNW (west-northwest)

Why does a circle have 360 degrees? →

Historical numeral systems

Babylonian (base 60): 𒁹𒁹𒁹𒁹𒁹𒁹𒁹 𒌋𒌋𒌋𒌋𒁹𒁹𒁹𒁹𒁹𒁹 𒌋𒌋𒌋𒌋𒁹𒁹𒁹𒁹
Egyptian hieroglyphic: 𓂍𓂍𓆼𓆼𓆼𓆼𓆼𓆼𓆼𓆼𓏺𓏺𓏺𓏺
Greek (Milesian): ͵κηδʹ
Mayan (base 20): 𝋣·𝋪·𝋠·𝋤
Chinese: 二萬八千零四
Chinese (financial): 貳萬捌仟零肆

In other modern scripts

Eastern Arabic ٢٨٠٠٤ Devanagari २८००४ Bengali ২৮০০৪ Tamil ௨௮௦௦௪ Thai ๒๘๐๐๔ Tibetan ༢༨༠༠༤ Khmer ២៨០០៤ Lao ໒໘໐໐໔ Burmese ၂၈၀၀၄

Digit at this position in famous constants

π — Pi (π): Digit 28,004 = 1
e — Euler's number (e): Digit 28,004 = 2
φ — Golden ratio (φ): Digit 28,004 = 0
√2 — Pythagoras's (√2): Digit 28,004 = 1
ln 2 — Natural log of 2: Digit 28,004 = 3
γ — Euler-Mascheroni (γ): Digit 28,004 = 8

Also seen as

Goldbach decomposition

Goldbach's conjecture says every even integer greater than 2 is the sum of two primes. For 28004, here are decompositions:

3 + 28001 = 28004
7 + 27997 = 28004
37 + 27967 = 28004
43 + 27961 = 28004
61 + 27943 = 28004
103 + 27901 = 28004
157 + 27847 = 28004
181 + 27823 = 28004

Showing the first eight; more decompositions exist.

Unicode codepoint

浤

CJK Unified Ideograph-6D64

U+6D64

Other letter (Lo)

UTF-8 encoding: E6 B5 A4 (3 bytes).

Lookup U+6D64 on Compart ↗ Lookup on FileFormat.Info ↗

Hex color

#006D64

RGB(0, 109, 100)

IPv4 address

As an unsigned 32-bit integer, this is the IPv4 address 0.0.109.100.

Address: 0.0.109.100
Class: reserved
IPv4-mapped IPv6: ::ffff:0.0.109.100

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

Position in π

The digit sequence 28004 first appears in π at position 60,183 of the decimal expansion (the 60,183ordinal-suffix:rd digit after the integer 3).

Search range: the first 1,000,000 fractional digits of π. Any 6-digit-or-shorter string is virtually guaranteed to appear in there — the more interesting signal is the position.

Look up 28004 on Pi Search ↗