28,008
28,008 is a composite number, even.
Properties
- Parity
- Even
- Digit count
- 5
- Digit sum
- 18
- Digit product
- 0
- Digital root
- 9
- Palindrome
- No
- Bit width
- 15 bits
- Reversed
- 80,082
- Recamán's sequence
- a(34,415) = 28,008
- Square (n²)
- 784,448,064
- Cube (n³)
- 21,970,821,376,512
- Divisor count
- 24
- σ(n) — sum of divisors
- 76,050
- φ(n) — Euler's totient
- 9,312
- Sum of prime factors
- 401
Primality
Prime factorization: 2 3 × 3 2 × 389
Divisors & multiples
Sums & aliquot sequence
Representations
- In words
- twenty-eight thousand eight
- Ordinal
- 28008th
- Binary
- 110110101101000
- Octal
- 66550
- Hexadecimal
- 0x6D68
- Base64
- bWg=
- One's complement
- 37,527 (16-bit)
Historical numeral systems
- Babylonian (base 60)
- 𒁹𒁹𒁹𒁹𒁹𒁹𒁹 𒌋𒌋𒌋𒌋𒁹𒁹𒁹𒁹𒁹𒁹 𒌋𒌋𒌋𒌋𒁹𒁹𒁹𒁹𒁹𒁹𒁹𒁹
- Egyptian hieroglyphic
- 𓂍𓂍𓆼𓆼𓆼𓆼𓆼𓆼𓆼𓆼𓏺𓏺𓏺𓏺𓏺𓏺𓏺𓏺
- Greek (Milesian)
- ͵κηηʹ
- Mayan (base 20)
- 𝋣·𝋪·𝋠·𝋨
- Chinese
- 二萬八千零八
- Chinese (financial)
- 貳萬捌仟零捌
Digit at this position in famous constants
- π — Pi (π)
- Digit 28,008 = 8
- e — Euler's number (e)
- Digit 28,008 = 3
- φ — Golden ratio (φ)
- Digit 28,008 = 9
- √2 — Pythagoras's (√2)
- Digit 28,008 = 0
- ln 2 — Natural log of 2
- Digit 28,008 = 6
- γ — Euler-Mascheroni (γ)
- Digit 28,008 = 9
Also seen as
Goldbach's conjecture says every even integer greater than 2 is the sum of two primes. For 28008, here are decompositions:
- 7 + 28001 = 28008
- 11 + 27997 = 28008
- 41 + 27967 = 28008
- 47 + 27961 = 28008
- 61 + 27947 = 28008
- 67 + 27941 = 28008
- 89 + 27919 = 28008
- 107 + 27901 = 28008
Showing the first eight; more decompositions exist.
UTF-8 encoding: E6 B5 A8 (3 bytes).
As an unsigned 32-bit integer, this is the IPv4 address 0.0.109.104.
- Address
- 0.0.109.104
- Class
- reserved
- IPv4-mapped IPv6
- ::ffff:0.0.109.104
Unspecified address (0.0.0.0/8) — "this network" placeholder.
This passes the ABA routing number checksum and matches the Federal Reserve numbering scheme.
Banks operate many routing numbers per state and division; an unmatched checksum-valid number can still be a real RTN at a smaller institution.
The digit sequence 28008 first appears in π at position 63,497 of the decimal expansion (the 63,497ordinal-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.