28,040
28,040 is a composite number, even.
Properties
- Parity
- Even
- Digit count
- 5
- Digit sum
- 14
- Digit product
- 0
- Digital root
- 5
- Palindrome
- No
- Bit width
- 15 bits
- Reversed
- 4,082
- Recamán's sequence
- a(34,351) = 28,040
- Square (n²)
- 786,241,600
- Cube (n³)
- 22,046,214,464,000
- Divisor count
- 16
- σ(n) — sum of divisors
- 63,180
- φ(n) — Euler's totient
- 11,200
- Sum of prime factors
- 712
Primality
Prime factorization: 2 3 × 5 × 701
Divisors & multiples
Sums & aliquot sequence
Representations
- In words
- twenty-eight thousand forty
- Ordinal
- 28040th
- Binary
- 110110110001000
- Octal
- 66610
- Hexadecimal
- 0x6D88
- Base64
- bYg=
- One's complement
- 37,495 (16-bit)
Historical numeral systems
- Babylonian (base 60)
- 𒁹𒁹𒁹𒁹𒁹𒁹𒁹 𒌋𒌋𒌋𒌋𒁹𒁹𒁹𒁹𒁹𒁹𒁹 𒌋𒌋
- Egyptian hieroglyphic
- 𓂍𓂍𓆼𓆼𓆼𓆼𓆼𓆼𓆼𓆼𓎆𓎆𓎆𓎆
- Greek (Milesian)
- ͵κημʹ
- Mayan (base 20)
- 𝋣·𝋪·𝋢·𝋠
- Chinese
- 二萬八千零四十
- Chinese (financial)
- 貳萬捌仟零肆拾
Digit at this position in famous constants
- π — Pi (π)
- Digit 28,040 = 3
- e — Euler's number (e)
- Digit 28,040 = 9
- φ — Golden ratio (φ)
- Digit 28,040 = 4
- √2 — Pythagoras's (√2)
- Digit 28,040 = 7
- ln 2 — Natural log of 2
- Digit 28,040 = 0
- γ — Euler-Mascheroni (γ)
- Digit 28,040 = 0
Also seen as
Goldbach's conjecture says every even integer greater than 2 is the sum of two primes. For 28040, here are decompositions:
- 13 + 28027 = 28040
- 43 + 27997 = 28040
- 73 + 27967 = 28040
- 79 + 27961 = 28040
- 97 + 27943 = 28040
- 139 + 27901 = 28040
- 157 + 27883 = 28040
- 193 + 27847 = 28040
Showing the first eight; more decompositions exist.
UTF-8 encoding: E6 B6 88 (3 bytes).
As an unsigned 32-bit integer, this is the IPv4 address 0.0.109.136.
- Address
- 0.0.109.136
- Class
- reserved
- IPv4-mapped IPv6
- ::ffff:0.0.109.136
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 28040 first appears in π at position 32,311 of the decimal expansion (the 32,311ordinal-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.