138,428
138,428 is a composite number, even.
138,428 (one hundred thirty-eight thousand four hundred twenty-eight) is an even 6-digit number. It is a composite number with 6 divisors, and factors as 2² × 34,607. Written other ways, in hexadecimal, 0x21CBC.
Interestingness
Properties
- Parity
- Even
- Digit count
- 6
- Digit sum
- 26
- Digit product
- 1,536
- Digital root
- 8
- Palindrome
- No
- Bit width
- 18 bits
- Reversed
- 824,831
- Recamán's sequence
- a(491,971) = 138,428
- Square (n²)
- 19,162,311,184
- Cube (n³)
- 2,652,600,412,578,752
- Divisor count
- 6
- σ(n) — sum of divisors
- 242,256
- φ(n) — Euler's totient
- 69,212
- Sum of prime factors
- 34,611
Primality
Prime factorization: 2 2 × 34607
Divisors & multiples
Sums & aliquot sequence
Continued fraction of √n
√138,428 = [372; (16, 1, 10, 6, 17, 7, 10, 2, 1, 19, 2, 3, 3, 2, 4, 1, 3, 2, 1, 13, 1, 1, 1, 1, …)]
Representations
- In words
- one hundred thirty-eight thousand four hundred twenty-eight
- Ordinal
- 138428th
- Binary
- 100001110010111100
- Octal
- 416274
- Hexadecimal
- 0x21CBC
- Base64
- Ahy8
- One's complement
- 4,294,828,867 (32-bit)
- Scientific notation
- 1.38428 × 10⁵
- As a duration
- 138,428 s = 1 day, 14 hours, 27 minutes, 8 seconds
As an angle
Historical numeral systems
- Babylonian (base 60)
- 𒌋𒌋𒌋𒁹𒁹𒁹𒁹𒁹𒁹𒁹𒁹 𒌋𒌋𒁹𒁹𒁹𒁹𒁹𒁹𒁹 𒁹𒁹𒁹𒁹𒁹𒁹𒁹𒁹
- Egyptian hieroglyphic
- 𓆐𓂍𓂍𓂍𓆼𓆼𓆼𓆼𓆼𓆼𓆼𓆼𓍢𓍢𓍢𓍢𓎆𓎆𓏺𓏺𓏺𓏺𓏺𓏺𓏺𓏺
- Greek (Milesian)
- ͵ρληυκηʹ
- Mayan (base 20)
- 𝋱·𝋦·𝋡·𝋨
- Chinese
- 一十三萬八千四百二十八
- Chinese (financial)
- 壹拾參萬捌仟肆佰貳拾捌
Also seen as
Goldbach's conjecture says every even integer greater than 2 is the sum of two primes. For 138428, here are decompositions:
- 79 + 138349 = 138428
- 109 + 138319 = 138428
- 139 + 138289 = 138428
- 181 + 138247 = 138428
- 271 + 138157 = 138428
- 349 + 138079 = 138428
- 421 + 138007 = 138428
- 487 + 137941 = 138428
Showing the first eight; more decompositions exist.
UTF-8 encoding: F0 A1 B2 BC (4 bytes).
As an unsigned 32-bit integer, this is the IPv4 address 0.2.28.188.
- Address
- 0.2.28.188
- Class
- reserved
- IPv4-mapped IPv6
- ::ffff:0.2.28.188
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 138,428 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.