138,006
138,006 is a composite number, even.
138,006 (one hundred thirty-eight thousand six) is an even 6-digit number. It is a composite number with 48 divisors, and factors as 2 × 3² × 11 × 17 × 41. Its proper divisors sum to 215,802, more than the number itself, making it an abundant number. Written other ways, in hexadecimal, 0x21B16.
Interestingness
Properties
- Parity
- Even
- Digit count
- 6
- Digit sum
- 18
- Digit product
- 0
- Digital root
- 9
- Palindrome
- No
- Bit width
- 18 bits
- Reversed
- 600,831
- Recamán's sequence
- a(492,815) = 138,006
- Square (n²)
- 19,045,656,036
- Cube (n³)
- 2,628,414,806,904,216
- Divisor count
- 48
- σ(n) — sum of divisors
- 353,808
- φ(n) — Euler's totient
- 38,400
- Sum of prime factors
- 77
Primality
Prime factorization: 2 × 3 2 × 11 × 17 × 41
Divisors & multiples
Sums & aliquot sequence
Continued fraction of √n
√138,006 = [371; (2, 29, 4, 1, 1, 4, 3, 1, 2, 2, 7, 6, 3, 14, 1, 5, 1, 1, 9, 9, 14, 1, 2, 1, …)]
Period length 50 — the block in parentheses repeats forever.
Representations
- In words
- one hundred thirty-eight thousand six
- Ordinal
- 138006th
- Binary
- 100001101100010110
- Octal
- 415426
- Hexadecimal
- 0x21B16
- Base64
- AhsW
- One's complement
- 4,294,829,289 (32-bit)
- Scientific notation
- 1.38006 × 10⁵
- As a duration
- 138,006 s = 1 day, 14 hours, 20 minutes, 6 seconds
As an angle
Historical numeral systems
- Babylonian (base 60)
- 𒌋𒌋𒌋𒁹𒁹𒁹𒁹𒁹𒁹𒁹𒁹 𒌋𒌋 𒁹𒁹𒁹𒁹𒁹𒁹
- Egyptian hieroglyphic
- 𓆐𓂍𓂍𓂍𓆼𓆼𓆼𓆼𓆼𓆼𓆼𓆼𓏺𓏺𓏺𓏺𓏺𓏺
- Greek (Milesian)
- ͵ρληϛʹ
- Mayan (base 20)
- 𝋱·𝋥·𝋠·𝋦
- Chinese
- 一十三萬八千零六
- Chinese (financial)
- 壹拾參萬捌仟零陸
Also seen as
Goldbach's conjecture says every even integer greater than 2 is the sum of two primes. For 138006, here are decompositions:
- 7 + 137999 = 138006
- 13 + 137993 = 138006
- 23 + 137983 = 138006
- 59 + 137947 = 138006
- 73 + 137933 = 138006
- 79 + 137927 = 138006
- 97 + 137909 = 138006
- 137 + 137869 = 138006
Showing the first eight; more decompositions exist.
UTF-8 encoding: F0 A1 AC 96 (4 bytes).
As an unsigned 32-bit integer, this is the IPv4 address 0.2.27.22.
- Address
- 0.2.27.22
- Class
- reserved
- IPv4-mapped IPv6
- ::ffff:0.2.27.22
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 138,006 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 138006 first appears in π at position 637,499 of the decimal expansion (the 637,499ordinal-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°.