Number
28,001
28,001 is a prime, odd.
Properties
- Parity
- Odd
- Digit count
- 5
- Digit sum
- 11
- Digit product
- 0
- Digital root
- 2
- Palindrome
- No
- Bit width
- 15 bits
- Reversed
- 10,082
- Recamán's sequence
- a(34,429) = 28,001
- Square (n²)
- 784,056,001
- Cube (n³)
- 21,954,352,084,001
- Divisor count
- 2
- σ(n) — sum of divisors
- 28,002
- φ(n) — Euler's totient
- 28,000
Primality
28,001 is prime. It has exactly two divisors: 1 and itself.
Divisors & multiples
Aliquot sum (sum of proper divisors):
1
First multiples
28,001
·
56,002
(double)
·
84,003
·
112,004
·
140,005
·
168,006
·
196,007
·
224,008
·
252,009
·
280,010
Sums & aliquot sequence
As a sum of two squares:
49² + 160²
As consecutive integers:
14,000 + 14,001
Representations
- In words
- twenty-eight thousand one
- Ordinal
- 28001st
- Binary
- 110110101100001
- Octal
- 66541
- Hexadecimal
- 0x6D61
- Base64
- bWE=
- One's complement
- 37,534 (16-bit)
In other bases
ternary (3)
1102102002
quaternary (4)
12311201
quinary (5)
1344001
senary (6)
333345
septenary (7)
144431
nonary (9)
42362
undecimal (11)
1a046
duodecimal (12)
14255
tridecimal (13)
c98c
tetradecimal (14)
a2c1
pentadecimal (15)
846b
Historical numeral systems
- Babylonian (base 60)
- 𒁹𒁹𒁹𒁹𒁹𒁹𒁹 𒌋𒌋𒌋𒌋𒁹𒁹𒁹𒁹𒁹𒁹 𒌋𒌋𒌋𒌋𒁹
- Egyptian hieroglyphic
- 𓂍𓂍𓆼𓆼𓆼𓆼𓆼𓆼𓆼𓆼𓏺
- Greek (Milesian)
- ͵κηαʹ
- Mayan (base 20)
- 𝋣·𝋪·𝋠·𝋡
- Chinese
- 二萬八千零一
- Chinese (financial)
- 貳萬捌仟零壹
In other modern scripts
Eastern Arabic
٢٨٠٠١
Devanagari
२८००१
Bengali
২৮০০১
Tamil
௨௮௦௦௧
Thai
๒๘๐๐๑
Tibetan
༢༨༠༠༡
Khmer
២៨០០១
Lao
໒໘໐໐໑
Burmese
၂၈၀၀၁
Digit at this position in famous constants
- π — Pi (π)
- Digit 28,001 = 5
- e — Euler's number (e)
- Digit 28,001 = 3
- φ — Golden ratio (φ)
- Digit 28,001 = 6
- √2 — Pythagoras's (√2)
- Digit 28,001 = 7
- ln 2 — Natural log of 2
- Digit 28,001 = 9
- γ — Euler-Mascheroni (γ)
- Digit 28,001 = 4
Also seen as
Prime neighborhood
Unicode codepoint
浡
CJK Unified Ideograph-6D61
U+6D61
Other letter (Lo)
UTF-8 encoding: E6 B5 A1 (3 bytes).
Hex color
#006D61
RGB(0, 109, 97)
IPv4 address
As an unsigned 32-bit integer, this is the IPv4 address 0.0.109.97.
- Address
- 0.0.109.97
- Class
- reserved
- IPv4-mapped IPv6
- ::ffff:0.0.109.97
Unspecified address (0.0.0.0/8) — "this network" placeholder.
Position in π
The digit sequence 28001 first appears in π at position 64,245 of the decimal expansion (the 64,245ordinal-suffix:th 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.