138,308
138,308 is a composite number, even.
138,308 (one hundred thirty-eight thousand three hundred eight) is an even 6-digit number. It is a composite number with 12 divisors, and factors as 2² × 71 × 487. Written other ways, in hexadecimal, 0x21C44.
Interestingness
Properties
- Parity
- Even
- Digit count
- 6
- Digit sum
- 23
- Digit product
- 0
- Digital root
- 5
- Palindrome
- No
- Bit width
- 18 bits
- Reversed
- 803,831
- Recamán's sequence
- a(492,211) = 138,308
- Square (n²)
- 19,129,102,864
- Cube (n³)
- 2,645,707,958,914,112
- Divisor count
- 12
- σ(n) — sum of divisors
- 245,952
- φ(n) — Euler's totient
- 68,040
- Sum of prime factors
- 562
Primality
Prime factorization: 2 2 × 71 × 487
Divisors & multiples
Sums & aliquot sequence
Continued fraction of √n
√138,308 = [371; (1, 8, 1, 3, 1, 2, 1, 1, 3, 11, 2, 1, 11, 1, 13, 2, 1, 1, 1, 1, 2, 2, 1, 1, …)]
Representations
- In words
- one hundred thirty-eight thousand three hundred eight
- Ordinal
- 138308th
- Binary
- 100001110001000100
- Octal
- 416104
- Hexadecimal
- 0x21C44
- Base64
- AhxE
- One's complement
- 4,294,828,987 (32-bit)
- Scientific notation
- 1.38308 × 10⁵
- As a duration
- 138,308 s = 1 day, 14 hours, 25 minutes, 8 seconds
As an angle
Historical numeral systems
- Babylonian (base 60)
- 𒌋𒌋𒌋𒁹𒁹𒁹𒁹𒁹𒁹𒁹𒁹 𒌋𒌋𒁹𒁹𒁹𒁹𒁹 𒁹𒁹𒁹𒁹𒁹𒁹𒁹𒁹
- Egyptian hieroglyphic
- 𓆐𓂍𓂍𓂍𓆼𓆼𓆼𓆼𓆼𓆼𓆼𓆼𓍢𓍢𓍢𓏺𓏺𓏺𓏺𓏺𓏺𓏺𓏺
- Greek (Milesian)
- ͵ρλητηʹ
- Mayan (base 20)
- 𝋱·𝋥·𝋯·𝋨
- Chinese
- 一十三萬八千三百零八
- Chinese (financial)
- 壹拾參萬捌仟參佰零捌
Also seen as
Goldbach's conjecture says every even integer greater than 2 is the sum of two primes. For 138308, here are decompositions:
- 19 + 138289 = 138308
- 61 + 138247 = 138308
- 67 + 138241 = 138308
- 127 + 138181 = 138308
- 151 + 138157 = 138308
- 229 + 138079 = 138308
- 367 + 137941 = 138308
- 397 + 137911 = 138308
Showing the first eight; more decompositions exist.
UTF-8 encoding: F0 A1 B1 84 (4 bytes).
As an unsigned 32-bit integer, this is the IPv4 address 0.2.28.68.
- Address
- 0.2.28.68
- Class
- reserved
- IPv4-mapped IPv6
- ::ffff:0.2.28.68
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 138,308 and was likely granted around 1872.
Patent numbers below 100,000 are excluded as too ambiguous; modern numbering currently reaches roughly 12.5 million.
Related reading
- Mayan numerals — Vigesimal dots-and-bars with a shell zero — one of the earliest true zeros.