28,672
28,672 is a composite number, even.
28,672 (twenty-eight thousand six hundred seventy-two) is an even 5-digit number. It is a composite number with 26 divisors, and factors as 2¹² × 7. Its proper divisors sum to 36,856, more than the number itself, making it an abundant number. Written other ways, in hexadecimal, 0x7000.
Interestingness
Properties
- Parity
- Even
- Digit count
- 5
- Digit sum
- 25
- Digit product
- 1,344
- Digital root
- 7
- Palindrome
- No
- Bit width
- 15 bits
- Reversed
- 27,682
- Recamán's sequence
- a(79,796) = 28,672
- Square (n²)
- 822,083,584
- Cube (n³)
- 23,570,780,520,448
- Divisor count
- 26
- σ(n) — sum of divisors
- 65,528
- φ(n) — Euler's totient
- 12,288
- Sum of prime factors
- 31
Primality
Prime factorization: 2 12 × 7
Divisors & multiples
Sums & aliquot sequence
Continued fraction of √n
√28,672 = [169; (3, 20, 1, 4, 1, 83, 1, 4, 1, 20, 3, 338)]
Period length 12 — the block in parentheses repeats forever.
Representations
- In words
- twenty-eight thousand six hundred seventy-two
- Ordinal
- 28672nd
- Binary
- 111000000000000
- Octal
- 70000
- Hexadecimal
- 0x7000
- Base64
- cAA=
- One's complement
- 36,863 (16-bit)
- Scientific notation
- 2.8672 × 10⁴
- As a duration
- 28,672 s = 7 hours, 57 minutes, 52 seconds
As an angle
Historical numeral systems
- Babylonian (base 60)
- 𒁹𒁹𒁹𒁹𒁹𒁹𒁹 𒌋𒌋𒌋𒌋𒌋𒁹𒁹𒁹𒁹𒁹𒁹𒁹 𒌋𒌋𒌋𒌋𒌋𒁹𒁹
- Egyptian hieroglyphic
- 𓂍𓂍𓆼𓆼𓆼𓆼𓆼𓆼𓆼𓆼𓍢𓍢𓍢𓍢𓍢𓍢𓎆𓎆𓎆𓎆𓎆𓎆𓎆𓏺𓏺
- Greek (Milesian)
- ͵κηχοβʹ
- Mayan (base 20)
- 𝋣·𝋫·𝋭·𝋬
- Chinese
- 二萬八千六百七十二
- Chinese (financial)
- 貳萬捌仟陸佰柒拾貳
Digit at this position in famous constants
- π — Pi (π)
- Digit 28,672 = 1
- e — Euler's number (e)
- Digit 28,672 = 2
- φ — Golden ratio (φ)
- Digit 28,672 = 8
- √2 — Pythagoras's (√2)
- Digit 28,672 = 0
- ln 2 — Natural log of 2
- Digit 28,672 = 1
- γ — Euler-Mascheroni (γ)
- Digit 28,672 = 0
Also seen as
Goldbach's conjecture says every even integer greater than 2 is the sum of two primes. For 28672, here are decompositions:
- 3 + 28669 = 28672
- 11 + 28661 = 28672
- 23 + 28649 = 28672
- 29 + 28643 = 28672
- 41 + 28631 = 28672
- 53 + 28619 = 28672
- 101 + 28571 = 28672
- 113 + 28559 = 28672
Showing the first eight; more decompositions exist.
UTF-8 encoding: E7 80 80 (3 bytes).
As an unsigned 32-bit integer, this is the IPv4 address 0.0.112.0.
- Address
- 0.0.112.0
- Class
- reserved
- IPv4-mapped IPv6
- ::ffff:0.0.112.0
Unspecified address (0.0.0.0/8) — "this network" placeholder.
The digit sequence 28672 first appears in π at position 45,403 of the decimal expansion (the 45,403ordinal-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.
Related reading
- Egyptian hieroglyphic numerals — Seven hieroglyphs for every power of ten, from a single stroke to a million.