138,538
138,538 is a composite number, even.
138,538 (one hundred thirty-eight thousand five hundred thirty-eight) is an even 6-digit number. It is a composite number with 8 divisors, and factors as 2 × 113 × 613. Written other ways, in hexadecimal, 0x21D2A.
Interestingness
Properties
- Parity
- Even
- Digit count
- 6
- Digit sum
- 28
- Digit product
- 2,880
- Digital root
- 1
- Palindrome
- No
- Bit width
- 18 bits
- Reversed
- 835,831
- Recamán's sequence
- a(491,751) = 138,538
- Square (n²)
- 19,192,777,444
- Cube (n³)
- 2,658,929,001,536,872
- Divisor count
- 8
- σ(n) — sum of divisors
- 209,988
- φ(n) — Euler's totient
- 68,544
- Sum of prime factors
- 728
Primality
Prime factorization: 2 × 113 × 613
Divisors & multiples
Sums & aliquot sequence
Continued fraction of √n
√138,538 = [372; (4, 1, 4, 1, 33, 106, 3, 5, 1, 4, 1, 1, 4, 3, 2, 14, 1, 3, 6, 2, 4, 1, 2, 1, …)]
Representations
- In words
- one hundred thirty-eight thousand five hundred thirty-eight
- Ordinal
- 138538th
- Binary
- 100001110100101010
- Octal
- 416452
- Hexadecimal
- 0x21D2A
- Base64
- Ah0q
- One's complement
- 4,294,828,757 (32-bit)
- Scientific notation
- 1.38538 × 10⁵
- As a duration
- 138,538 s = 1 day, 14 hours, 28 minutes, 58 seconds
As an angle
Historical numeral systems
- Babylonian (base 60)
- 𒌋𒌋𒌋𒁹𒁹𒁹𒁹𒁹𒁹𒁹𒁹 𒌋𒌋𒁹𒁹𒁹𒁹𒁹𒁹𒁹𒁹 𒌋𒌋𒌋𒌋𒌋𒁹𒁹𒁹𒁹𒁹𒁹𒁹𒁹
- Egyptian hieroglyphic
- 𓆐𓂍𓂍𓂍𓆼𓆼𓆼𓆼𓆼𓆼𓆼𓆼𓍢𓍢𓍢𓍢𓍢𓎆𓎆𓎆𓏺𓏺𓏺𓏺𓏺𓏺𓏺𓏺
- Greek (Milesian)
- ͵ρληφληʹ
- Mayan (base 20)
- 𝋱·𝋦·𝋦·𝋲
- Chinese
- 一十三萬八千五百三十八
- Chinese (financial)
- 壹拾參萬捌仟伍佰參拾捌
Also seen as
Goldbach's conjecture says every even integer greater than 2 is the sum of two primes. For 138538, here are decompositions:
- 41 + 138497 = 138538
- 89 + 138449 = 138538
- 131 + 138407 = 138538
- 137 + 138401 = 138538
- 149 + 138389 = 138538
- 167 + 138371 = 138538
- 227 + 138311 = 138538
- 347 + 138191 = 138538
Showing the first eight; more decompositions exist.
UTF-8 encoding: F0 A1 B4 AA (4 bytes).
As an unsigned 32-bit integer, this is the IPv4 address 0.2.29.42.
- Address
- 0.2.29.42
- Class
- reserved
- IPv4-mapped IPv6
- ::ffff:0.2.29.42
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 138,538 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
- Egyptian hieroglyphic numerals — Seven hieroglyphs for every power of ten, from a single stroke to a million.