138,490
138,490 is a composite number, even.
138,490 (one hundred thirty-eight thousand four hundred ninety) is an even 6-digit number. It is a composite number with 16 divisors, and factors as 2 × 5 × 11 × 1,259. Written other ways, in hexadecimal, 0x21CFA.
Interestingness
Properties
- Parity
- Even
- Digit count
- 6
- Digit sum
- 25
- Digit product
- 0
- Digital root
- 7
- Palindrome
- No
- Bit width
- 18 bits
- Reversed
- 94,831
- Recamán's sequence
- a(491,847) = 138,490
- Square (n²)
- 19,179,480,100
- Cube (n³)
- 2,656,166,199,049,000
- Divisor count
- 16
- σ(n) — sum of divisors
- 272,160
- φ(n) — Euler's totient
- 50,320
- Sum of prime factors
- 1,277
Primality
Prime factorization: 2 × 5 × 11 × 1259
Divisors & multiples
Sums & aliquot sequence
Continued fraction of √n
√138,490 = [372; (7, 49, 2, 9, 1, 81, 1, 3, 1, 5, 2, 5, 18, 1, 9, 9, 11, 2, 1, 14, 1, 1, 18, 1, …)]
Representations
- In words
- one hundred thirty-eight thousand four hundred ninety
- Ordinal
- 138490th
- Binary
- 100001110011111010
- Octal
- 416372
- Hexadecimal
- 0x21CFA
- Base64
- Ahz6
- One's complement
- 4,294,828,805 (32-bit)
- Scientific notation
- 1.3849 × 10⁵
- As a duration
- 138,490 s = 1 day, 14 hours, 28 minutes, 10 seconds
As an angle
Historical numeral systems
- Babylonian (base 60)
- 𒌋𒌋𒌋𒁹𒁹𒁹𒁹𒁹𒁹𒁹𒁹 𒌋𒌋𒁹𒁹𒁹𒁹𒁹𒁹𒁹𒁹 𒌋
- Egyptian hieroglyphic
- 𓆐𓂍𓂍𓂍𓆼𓆼𓆼𓆼𓆼𓆼𓆼𓆼𓍢𓍢𓍢𓍢𓎆𓎆𓎆𓎆𓎆𓎆𓎆𓎆𓎆
- Greek (Milesian)
- ͵ρληυϟʹ
- Mayan (base 20)
- 𝋱·𝋦·𝋤·𝋪
- Chinese
- 一十三萬八千四百九十
- Chinese (financial)
- 壹拾參萬捌仟肆佰玖拾
Also seen as
Goldbach's conjecture says every even integer greater than 2 is the sum of two primes. For 138490, here are decompositions:
- 29 + 138461 = 138490
- 41 + 138449 = 138490
- 83 + 138407 = 138490
- 89 + 138401 = 138490
- 101 + 138389 = 138490
- 167 + 138323 = 138490
- 179 + 138311 = 138490
- 239 + 138251 = 138490
Showing the first eight; more decompositions exist.
UTF-8 encoding: F0 A1 B3 BA (4 bytes).
As an unsigned 32-bit integer, this is the IPv4 address 0.2.28.250.
- Address
- 0.2.28.250
- Class
- reserved
- IPv4-mapped IPv6
- ::ffff:0.2.28.250
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 138,490 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
- Egyptian hieroglyphic numerals — Seven hieroglyphs for every power of ten, from a single stroke to a million.