138,404
138,404 is a composite number, even.
138,404 (one hundred thirty-eight thousand four hundred four) is an even 6-digit number. It is a composite number with 12 divisors, and factors as 2² × 7 × 4,943. Its proper divisors sum to 138,460, more than the number itself, making it an abundant number. Written other ways, in hexadecimal, 0x21CA4.
Interestingness
Properties
- Parity
- Even
- Digit count
- 6
- Digit sum
- 20
- Digit product
- 0
- Digital root
- 2
- Palindrome
- No
- Bit width
- 18 bits
- Reversed
- 404,831
- Recamán's sequence
- a(492,019) = 138,404
- Square (n²)
- 19,155,667,216
- Cube (n³)
- 2,651,220,965,363,264
- Divisor count
- 12
- σ(n) — sum of divisors
- 276,864
- φ(n) — Euler's totient
- 59,304
- Sum of prime factors
- 4,954
Primality
Prime factorization: 2 2 × 7 × 4943
Divisors & multiples
Sums & aliquot sequence
Continued fraction of √n
√138,404 = [372; (37, 4, 1, 28, 1, 24, 1, 2, 4, 3, 5, 23, 15, 1, 3, 1, 2, 2, 12, 5, 2, 1, 5, 1, …)]
Representations
- In words
- one hundred thirty-eight thousand four hundred four
- Ordinal
- 138404th
- Binary
- 100001110010100100
- Octal
- 416244
- Hexadecimal
- 0x21CA4
- Base64
- Ahyk
- One's complement
- 4,294,828,891 (32-bit)
- Scientific notation
- 1.38404 × 10⁵
- As a duration
- 138,404 s = 1 day, 14 hours, 26 minutes, 44 seconds
As an angle
Historical numeral systems
- Babylonian (base 60)
- 𒌋𒌋𒌋𒁹𒁹𒁹𒁹𒁹𒁹𒁹𒁹 𒌋𒌋𒁹𒁹𒁹𒁹𒁹𒁹 𒌋𒌋𒌋𒌋𒁹𒁹𒁹𒁹
- Egyptian hieroglyphic
- 𓆐𓂍𓂍𓂍𓆼𓆼𓆼𓆼𓆼𓆼𓆼𓆼𓍢𓍢𓍢𓍢𓏺𓏺𓏺𓏺
- Greek (Milesian)
- ͵ρληυδʹ
- Mayan (base 20)
- 𝋱·𝋦·𝋠·𝋤
- Chinese
- 一十三萬八千四百零四
- Chinese (financial)
- 壹拾參萬捌仟肆佰零肆
Also seen as
Goldbach's conjecture says every even integer greater than 2 is the sum of two primes. For 138404, here are decompositions:
- 3 + 138401 = 138404
- 31 + 138373 = 138404
- 67 + 138337 = 138404
- 157 + 138247 = 138404
- 163 + 138241 = 138404
- 223 + 138181 = 138404
- 241 + 138163 = 138404
- 397 + 138007 = 138404
Showing the first eight; more decompositions exist.
UTF-8 encoding: F0 A1 B2 A4 (4 bytes).
As an unsigned 32-bit integer, this is the IPv4 address 0.2.28.164.
- Address
- 0.2.28.164
- Class
- reserved
- IPv4-mapped IPv6
- ::ffff:0.2.28.164
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 138,404 and was likely granted around 1872.
Patent numbers below 100,000 are excluded as too ambiguous; modern numbering currently reaches roughly 12.5 million.
Related reading
- Mayan numerals — Vigesimal dots-and-bars with a shell zero — one of the earliest true zeros.