138,188
138,188 is a composite number, even.
138,188 (one hundred thirty-eight thousand one hundred eighty-eight) is an even 6-digit number. It is a composite number with 12 divisors, and factors as 2² × 179 × 193. Written other ways, in hexadecimal, 0x21BCC.
Interestingness
Properties
- Parity
- Even
- Digit count
- 6
- Digit sum
- 29
- Digit product
- 1,536
- Digital root
- 2
- Palindrome
- No
- Bit width
- 18 bits
- Reversed
- 881,831
- Recamán's sequence
- a(492,451) = 138,188
- Square (n²)
- 19,095,923,344
- Cube (n³)
- 2,638,827,455,060,672
- Divisor count
- 12
- σ(n) — sum of divisors
- 244,440
- φ(n) — Euler's totient
- 68,352
- Sum of prime factors
- 376
Primality
Prime factorization: 2 2 × 179 × 193
Divisors & multiples
Sums & aliquot sequence
Continued fraction of √n
√138,188 = [371; (1, 2, 1, 3, 1, 6, 1, 1, 2, 1, 92, 4, 1, 1, 1, 1, 5, 14, 1, 184, 1, 14, 5, 1, …)]
Period length 40 — the block in parentheses repeats forever.
Representations
- In words
- one hundred thirty-eight thousand one hundred eighty-eight
- Ordinal
- 138188th
- Binary
- 100001101111001100
- Octal
- 415714
- Hexadecimal
- 0x21BCC
- Base64
- AhvM
- One's complement
- 4,294,829,107 (32-bit)
- Scientific notation
- 1.38188 × 10⁵
- As a duration
- 138,188 s = 1 day, 14 hours, 23 minutes, 8 seconds
As an angle
Historical numeral systems
- Babylonian (base 60)
- 𒌋𒌋𒌋𒁹𒁹𒁹𒁹𒁹𒁹𒁹𒁹 𒌋𒌋𒁹𒁹𒁹 𒁹𒁹𒁹𒁹𒁹𒁹𒁹𒁹
- Egyptian hieroglyphic
- 𓆐𓂍𓂍𓂍𓆼𓆼𓆼𓆼𓆼𓆼𓆼𓆼𓍢𓎆𓎆𓎆𓎆𓎆𓎆𓎆𓎆𓏺𓏺𓏺𓏺𓏺𓏺𓏺𓏺
- Greek (Milesian)
- ͵ρληρπηʹ
- Mayan (base 20)
- 𝋱·𝋥·𝋩·𝋨
- Chinese
- 一十三萬八千一百八十八
- Chinese (financial)
- 壹拾參萬捌仟壹佰捌拾捌
Also seen as
Goldbach's conjecture says every even integer greater than 2 is the sum of two primes. For 138188, here are decompositions:
- 7 + 138181 = 138188
- 31 + 138157 = 138188
- 109 + 138079 = 138188
- 181 + 138007 = 138188
- 241 + 137947 = 138188
- 277 + 137911 = 138188
- 397 + 137791 = 138188
- 601 + 137587 = 138188
Showing the first eight; more decompositions exist.
UTF-8 encoding: F0 A1 AF 8C (4 bytes).
As an unsigned 32-bit integer, this is the IPv4 address 0.2.27.204.
- Address
- 0.2.27.204
- Class
- reserved
- IPv4-mapped IPv6
- ::ffff:0.2.27.204
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 138,188 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 138188 first appears in π at position 84,331 of the decimal expansion (the 84,331ordinal-suffix:st 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
- Mayan numerals — Vigesimal dots-and-bars with a shell zero — one of the earliest true zeros.