138,018
138,018 is a composite number, even.
138,018 (one hundred thirty-eight thousand eighteen) is an even 6-digit number. It is a composite number with 8 divisors, and factors as 2 × 3 × 23,003. Its proper divisors sum to 138,030, more than the number itself, making it an abundant number. Written other ways, in hexadecimal, 0x21B22.
Interestingness
Properties
- Parity
- Even
- Digit count
- 6
- Digit sum
- 21
- Digit product
- 0
- Digital root
- 3
- Palindrome
- No
- Bit width
- 18 bits
- Reversed
- 810,831
- Recamán's sequence
- a(492,791) = 138,018
- Square (n²)
- 19,048,968,324
- Cube (n³)
- 2,629,100,510,141,832
- Divisor count
- 8
- σ(n) — sum of divisors
- 276,048
- φ(n) — Euler's totient
- 46,004
- Sum of prime factors
- 23,008
Primality
Prime factorization: 2 × 3 × 23003
Divisors & multiples
Sums & aliquot sequence
Continued fraction of √n
√138,018 = [371; (1, 1, 31, 1, 4, 8, 2, 1, 18, 2, 1, 2, 4, 1, 4, 1, 1, 1, 1, 3, 1, 1, 2, 3, …)]
Representations
- In words
- one hundred thirty-eight thousand eighteen
- Ordinal
- 138018th
- Binary
- 100001101100100010
- Octal
- 415442
- Hexadecimal
- 0x21B22
- Base64
- Ahsi
- One's complement
- 4,294,829,277 (32-bit)
- Scientific notation
- 1.38018 × 10⁵
- As a duration
- 138,018 s = 1 day, 14 hours, 20 minutes, 18 seconds
As an angle
Historical numeral systems
- Babylonian (base 60)
- 𒌋𒌋𒌋𒁹𒁹𒁹𒁹𒁹𒁹𒁹𒁹 𒌋𒌋 𒌋𒁹𒁹𒁹𒁹𒁹𒁹𒁹𒁹
- Egyptian hieroglyphic
- 𓆐𓂍𓂍𓂍𓆼𓆼𓆼𓆼𓆼𓆼𓆼𓆼𓎆𓏺𓏺𓏺𓏺𓏺𓏺𓏺𓏺
- Greek (Milesian)
- ͵ρληιηʹ
- Mayan (base 20)
- 𝋱·𝋥·𝋠·𝋲
- Chinese
- 一十三萬八千零一十八
- Chinese (financial)
- 壹拾參萬捌仟零壹拾捌
Also seen as
Goldbach's conjecture says every even integer greater than 2 is the sum of two primes. For 138018, here are decompositions:
- 11 + 138007 = 138018
- 19 + 137999 = 138018
- 61 + 137957 = 138018
- 71 + 137947 = 138018
- 107 + 137911 = 138018
- 109 + 137909 = 138018
- 149 + 137869 = 138018
- 151 + 137867 = 138018
Showing the first eight; more decompositions exist.
UTF-8 encoding: F0 A1 AC A2 (4 bytes).
As an unsigned 32-bit integer, this is the IPv4 address 0.2.27.34.
- Address
- 0.2.27.34
- Class
- reserved
- IPv4-mapped IPv6
- ::ffff:0.2.27.34
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 138,018 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 138018 first appears in π at position 852,529 of the decimal expansion (the 852,529ordinal-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
- Babylonian numerals — The base-60 cuneiform system that gave us 60 minutes, 60 seconds, and 360°.