138,992
138,992 is a composite number, even.
138,992 (one hundred thirty-eight thousand nine hundred ninety-two) is an even 6-digit number. It is a composite number with 40 divisors, and factors as 2⁴ × 7 × 17 × 73. Its proper divisors sum to 191,344, more than the number itself, making it an abundant number. Written other ways, in hexadecimal, 0x21EF0.
Interestingness
Properties
- Parity
- Even
- Digit count
- 6
- Digit sum
- 32
- Digit product
- 3,888
- Digital root
- 5
- Palindrome
- No
- Bit width
- 18 bits
- Reversed
- 299,831
- Recamán's sequence
- a(490,843) = 138,992
- Square (n²)
- 19,318,776,064
- Cube (n³)
- 2,685,155,322,687,488
- Divisor count
- 40
- σ(n) — sum of divisors
- 330,336
- φ(n) — Euler's totient
- 55,296
- Sum of prime factors
- 105
Primality
Prime factorization: 2 4 × 7 × 17 × 73
Divisors & multiples
Sums & aliquot sequence
Continued fraction of √n
√138,992 = [372; (1, 4, 2, 3, 1, 22, 1, 1, 9, 3, 3, 46, 3, 3, 9, 1, 1, 22, 1, 3, 2, 4, 1, 744)]
Period length 24 — the block in parentheses repeats forever.
Representations
- In words
- one hundred thirty-eight thousand nine hundred ninety-two
- Ordinal
- 138992nd
- Binary
- 100001111011110000
- Octal
- 417360
- Hexadecimal
- 0x21EF0
- Base64
- Ah7w
- One's complement
- 4,294,828,303 (32-bit)
- Scientific notation
- 1.38992 × 10⁵
- As a duration
- 138,992 s = 1 day, 14 hours, 36 minutes, 32 seconds
As an angle
Historical numeral systems
- Babylonian (base 60)
- 𒌋𒌋𒌋𒁹𒁹𒁹𒁹𒁹𒁹𒁹𒁹 𒌋𒌋𒌋𒁹𒁹𒁹𒁹𒁹𒁹 𒌋𒌋𒌋𒁹𒁹
- Egyptian hieroglyphic
- 𓆐𓂍𓂍𓂍𓆼𓆼𓆼𓆼𓆼𓆼𓆼𓆼𓍢𓍢𓍢𓍢𓍢𓍢𓍢𓍢𓍢𓎆𓎆𓎆𓎆𓎆𓎆𓎆𓎆𓎆𓏺𓏺
- Greek (Milesian)
- ͵ρληϡϟβʹ
- Mayan (base 20)
- 𝋱·𝋧·𝋩·𝋬
- Chinese
- 一十三萬八千九百九十二
- Chinese (financial)
- 壹拾參萬捌仟玖佰玖拾貳
Also seen as
Goldbach's conjecture says every even integer greater than 2 is the sum of two primes. For 138992, here are decompositions:
- 103 + 138889 = 138992
- 109 + 138883 = 138992
- 151 + 138841 = 138992
- 163 + 138829 = 138992
- 193 + 138799 = 138992
- 199 + 138793 = 138992
- 229 + 138763 = 138992
- 313 + 138679 = 138992
Showing the first eight; more decompositions exist.
UTF-8 encoding: F0 A1 BB B0 (4 bytes).
As an unsigned 32-bit integer, this is the IPv4 address 0.2.30.240.
- Address
- 0.2.30.240
- Class
- reserved
- IPv4-mapped IPv6
- ::ffff:0.2.30.240
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 138,992 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 138992 first appears in π at position 693,714 of the decimal expansion (the 693,714ordinal-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
- Mayan numerals — Vigesimal dots-and-bars with a shell zero — one of the earliest true zeros.