138,090
138,090 is a composite number, even.
138,090 (one hundred thirty-eight thousand ninety) is an even 6-digit number. It is a composite number with 16 divisors, and factors as 2 × 3 × 5 × 4,603. Its proper divisors sum to 193,398, more than the number itself, making it an abundant number. Written other ways, in hexadecimal, 0x21B6A.
Interestingness
Properties
- Parity
- Even
- Digit count
- 6
- Digit sum
- 21
- Digit product
- 0
- Digital root
- 3
- Palindrome
- No
- Bit width
- 18 bits
- Reversed
- 90,831
- Recamán's sequence
- a(492,647) = 138,090
- Square (n²)
- 19,068,848,100
- Cube (n³)
- 2,633,217,234,129,000
- Divisor count
- 16
- σ(n) — sum of divisors
- 331,488
- φ(n) — Euler's totient
- 36,816
- Sum of prime factors
- 4,613
Primality
Prime factorization: 2 × 3 × 5 × 4603
Divisors & multiples
Sums & aliquot sequence
Continued fraction of √n
√138,090 = [371; (1, 1, 1, 1, 8, 23, 1, 6, 18, 1, 10, 2, 17, 1, 1, 1, 5, 1, 1, 2, 2, 3, 1, 48, …)]
Period length 48 — the block in parentheses repeats forever.
Representations
- In words
- one hundred thirty-eight thousand ninety
- Ordinal
- 138090th
- Binary
- 100001101101101010
- Octal
- 415552
- Hexadecimal
- 0x21B6A
- Base64
- Ahtq
- One's complement
- 4,294,829,205 (32-bit)
- Scientific notation
- 1.3809 × 10⁵
- As a duration
- 138,090 s = 1 day, 14 hours, 21 minutes, 30 seconds
As an angle
Historical numeral systems
- Babylonian (base 60)
- 𒌋𒌋𒌋𒁹𒁹𒁹𒁹𒁹𒁹𒁹𒁹 𒌋𒌋𒁹 𒌋𒌋𒌋
- Egyptian hieroglyphic
- 𓆐𓂍𓂍𓂍𓆼𓆼𓆼𓆼𓆼𓆼𓆼𓆼𓎆𓎆𓎆𓎆𓎆𓎆𓎆𓎆𓎆
- Greek (Milesian)
- ͵ρληϟʹ
- Mayan (base 20)
- 𝋱·𝋥·𝋤·𝋪
- Chinese
- 一十三萬八千零九十
- Chinese (financial)
- 壹拾參萬捌仟零玖拾
Also seen as
Goldbach's conjecture says every even integer greater than 2 is the sum of two primes. For 138090, here are decompositions:
- 11 + 138079 = 138090
- 13 + 138077 = 138090
- 19 + 138071 = 138090
- 31 + 138059 = 138090
- 37 + 138053 = 138090
- 83 + 138007 = 138090
- 97 + 137993 = 138090
- 107 + 137983 = 138090
Showing the first eight; more decompositions exist.
UTF-8 encoding: F0 A1 AD AA (4 bytes).
As an unsigned 32-bit integer, this is the IPv4 address 0.2.27.106.
- Address
- 0.2.27.106
- Class
- reserved
- IPv4-mapped IPv6
- ::ffff:0.2.27.106
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 138,090 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 138090 first appears in π at position 434,230 of the decimal expansion (the 434,230ordinal-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°.