138,842
138,842 is a composite number, even.
138,842 (one hundred thirty-eight thousand eight hundred forty-two) is an even 6-digit number. It is a composite number with 8 divisors, and factors as 2 × 11 × 6,311. Written other ways, in hexadecimal, 0x21E5A.
Interestingness
Properties
- Parity
- Even
- Digit count
- 6
- Digit sum
- 26
- Digit product
- 1,536
- Digital root
- 8
- Palindrome
- No
- Bit width
- 18 bits
- Reversed
- 248,831
- Recamán's sequence
- a(491,143) = 138,842
- Square (n²)
- 19,277,100,964
- Cube (n³)
- 2,676,471,252,043,688
- Divisor count
- 8
- σ(n) — sum of divisors
- 227,232
- φ(n) — Euler's totient
- 63,100
- Sum of prime factors
- 6,324
Primality
Prime factorization: 2 × 11 × 6311
Divisors & multiples
Sums & aliquot sequence
Continued fraction of √n
√138,842 = [372; (1, 1, 1, 1, 2, 19, 4, 2, 2, 3, 3, 1, 1, 3, 5, 1, 1, 2, 2, 1, 4, 7, 2, 7, …)]
Representations
- In words
- one hundred thirty-eight thousand eight hundred forty-two
- Ordinal
- 138842nd
- Binary
- 100001111001011010
- Octal
- 417132
- Hexadecimal
- 0x21E5A
- Base64
- Ah5a
- One's complement
- 4,294,828,453 (32-bit)
- Scientific notation
- 1.38842 × 10⁵
- As a duration
- 138,842 s = 1 day, 14 hours, 34 minutes, 2 seconds
As an angle
Historical numeral systems
- Babylonian (base 60)
- 𒌋𒌋𒌋𒁹𒁹𒁹𒁹𒁹𒁹𒁹𒁹 𒌋𒌋𒌋𒁹𒁹𒁹𒁹 𒁹𒁹
- Egyptian hieroglyphic
- 𓆐𓂍𓂍𓂍𓆼𓆼𓆼𓆼𓆼𓆼𓆼𓆼𓍢𓍢𓍢𓍢𓍢𓍢𓍢𓍢𓎆𓎆𓎆𓎆𓏺𓏺
- Greek (Milesian)
- ͵ρληωμβʹ
- Mayan (base 20)
- 𝋱·𝋧·𝋢·𝋢
- Chinese
- 一十三萬八千八百四十二
- Chinese (financial)
- 壹拾參萬捌仟捌佰肆拾貳
Also seen as
Goldbach's conjecture says every even integer greater than 2 is the sum of two primes. For 138842, here are decompositions:
- 13 + 138829 = 138842
- 43 + 138799 = 138842
- 79 + 138763 = 138842
- 103 + 138739 = 138842
- 163 + 138679 = 138842
- 181 + 138661 = 138842
- 271 + 138571 = 138842
- 283 + 138559 = 138842
Showing the first eight; more decompositions exist.
UTF-8 encoding: F0 A1 B9 9A (4 bytes).
As an unsigned 32-bit integer, this is the IPv4 address 0.2.30.90.
- Address
- 0.2.30.90
- Class
- reserved
- IPv4-mapped IPv6
- ::ffff:0.2.30.90
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 138,842 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 138842 first appears in π at position 162,011 of the decimal expansion (the 162,011ordinal-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.