138,442
138,442 is a composite number, even.
138,442 (one hundred thirty-eight thousand four hundred forty-two) is an even 6-digit number. It is a composite number with 4 divisors, and factors as 2 × 69,221. Written other ways, in hexadecimal, 0x21CCA.
Interestingness
Properties
- Parity
- Even
- Digit count
- 6
- Digit sum
- 22
- Digit product
- 768
- Digital root
- 4
- Palindrome
- No
- Bit width
- 18 bits
- Reversed
- 244,831
- Recamán's sequence
- a(491,943) = 138,442
- Square (n²)
- 19,166,187,364
- Cube (n³)
- 2,653,405,311,046,888
- Divisor count
- 4
- σ(n) — sum of divisors
- 207,666
- φ(n) — Euler's totient
- 69,220
- Sum of prime factors
- 69,223
Primality
Prime factorization: 2 × 69221
Divisors & multiples
Sums & aliquot sequence
Continued fraction of √n
√138,442 = [372; (12, 1, 4, 1, 5, 2, 9, 1, 1, 2, 8, 1, 3, 1, 3, 1, 2, 5, 13, 1, 1, 2, 6, 3, …)]
Representations
- In words
- one hundred thirty-eight thousand four hundred forty-two
- Ordinal
- 138442nd
- Binary
- 100001110011001010
- Octal
- 416312
- Hexadecimal
- 0x21CCA
- Base64
- AhzK
- One's complement
- 4,294,828,853 (32-bit)
- Scientific notation
- 1.38442 × 10⁵
- As a duration
- 138,442 s = 1 day, 14 hours, 27 minutes, 22 seconds
As an angle
Historical numeral systems
- Babylonian (base 60)
- 𒌋𒌋𒌋𒁹𒁹𒁹𒁹𒁹𒁹𒁹𒁹 𒌋𒌋𒁹𒁹𒁹𒁹𒁹𒁹𒁹 𒌋𒌋𒁹𒁹
- Egyptian hieroglyphic
- 𓆐𓂍𓂍𓂍𓆼𓆼𓆼𓆼𓆼𓆼𓆼𓆼𓍢𓍢𓍢𓍢𓎆𓎆𓎆𓎆𓏺𓏺
- Greek (Milesian)
- ͵ρληυμβʹ
- Mayan (base 20)
- 𝋱·𝋦·𝋢·𝋢
- Chinese
- 一十三萬八千四百四十二
- Chinese (financial)
- 壹拾參萬捌仟肆佰肆拾貳
Also seen as
Goldbach's conjecture says every even integer greater than 2 is the sum of two primes. For 138442, here are decompositions:
- 41 + 138401 = 138442
- 53 + 138389 = 138442
- 71 + 138371 = 138442
- 131 + 138311 = 138442
- 191 + 138251 = 138442
- 233 + 138209 = 138442
- 251 + 138191 = 138442
- 263 + 138179 = 138442
Showing the first eight; more decompositions exist.
UTF-8 encoding: F0 A1 B3 8A (4 bytes).
As an unsigned 32-bit integer, this is the IPv4 address 0.2.28.202.
- Address
- 0.2.28.202
- Class
- reserved
- IPv4-mapped IPv6
- ::ffff:0.2.28.202
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 138,442 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 138442 first appears in π at position 209,121 of the decimal expansion (the 209,121ordinal-suffix:st 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
- Egyptian hieroglyphic numerals — Seven hieroglyphs for every power of ten, from a single stroke to a million.