131,728
131,728 is a composite number, even.
131,728 (one hundred thirty-one thousand seven hundred twenty-eight) is an even 6-digit number. It is a composite number with 10 divisors, and factors as 2⁴ × 8,233. Written other ways, in hexadecimal, 0x20290.
Interestingness
Properties
- Parity
- Even
- Digit count
- 6
- Digit sum
- 22
- Digit product
- 336
- Digital root
- 4
- Palindrome
- No
- Bit width
- 18 bits
- Reversed
- 827,131
- Recamán's sequence
- a(228,916) = 131,728
- Square (n²)
- 17,352,265,984
- Cube (n³)
- 2,285,779,293,540,352
- Divisor count
- 10
- σ(n) — sum of divisors
- 255,254
- φ(n) — Euler's totient
- 65,856
- Sum of prime factors
- 8,241
Primality
Prime factorization: 2 4 × 8233
Divisors & multiples
Sums & aliquot sequence
Continued fraction of √n
√131,728 = [362; (1, 16, 1, 2, 2, 2, 60, 12, 1, 2, 1, 1, 4, 1, 1, 80, 9, 1, 1, 5, 1, 21, 6, 1, …)]
Representations
- In words
- one hundred thirty-one thousand seven hundred twenty-eight
- Ordinal
- 131728th
- Binary
- 100000001010010000
- Octal
- 401220
- Hexadecimal
- 0x20290
- Base64
- AgKQ
- One's complement
- 4,294,835,567 (32-bit)
- Scientific notation
- 1.31728 × 10⁵
- As a duration
- 131,728 s = 1 day, 12 hours, 35 minutes, 28 seconds
Historical numeral systems
- Babylonian (base 60)
- 𒌋𒌋𒌋𒁹𒁹𒁹𒁹𒁹𒁹 𒌋𒌋𒌋𒁹𒁹𒁹𒁹𒁹 𒌋𒌋𒁹𒁹𒁹𒁹𒁹𒁹𒁹𒁹
- Egyptian hieroglyphic
- 𓆐𓂍𓂍𓂍𓆼𓍢𓍢𓍢𓍢𓍢𓍢𓍢𓎆𓎆𓏺𓏺𓏺𓏺𓏺𓏺𓏺𓏺
- Greek (Milesian)
- ͵ρλαψκηʹ
- Mayan (base 20)
- 𝋰·𝋩·𝋦·𝋨
- Chinese
- 一十三萬一千七百二十八
- Chinese (financial)
- 壹拾參萬壹仟柒佰貳拾捌
Also seen as
Goldbach's conjecture says every even integer greater than 2 is the sum of two primes. For 131728, here are decompositions:
- 17 + 131711 = 131728
- 41 + 131687 = 131728
- 89 + 131639 = 131728
- 101 + 131627 = 131728
- 137 + 131591 = 131728
- 167 + 131561 = 131728
- 227 + 131501 = 131728
- 239 + 131489 = 131728
Showing the first eight; more decompositions exist.
UTF-8 encoding: F0 A0 8A 90 (4 bytes).
As an unsigned 32-bit integer, this is the IPv4 address 0.2.2.144.
- Address
- 0.2.2.144
- Class
- reserved
- IPv4-mapped IPv6
- ::ffff:0.2.2.144
Unspecified address (0.0.0.0/8) — "this network" placeholder.
This number falls in the range of US utility patent numbers. If it's a patent, it would be issued as US 131,728 and was likely granted around 1872.
Patent numbers below 100,000 are excluded as too ambiguous; modern numbering currently reaches roughly 12.5 million.
The digit sequence 131728 first appears in π at position 458,959 of the decimal expansion (the 458,959ordinal-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.
Related reading
- Egyptian hieroglyphic numerals — Seven hieroglyphs for every power of ten, from a single stroke to a million.