138,488
138,488 is a composite number, even.
138,488 (one hundred thirty-eight thousand four hundred eighty-eight) is an even 6-digit number. It is a composite number with 16 divisors, and factors as 2³ × 7 × 2,473. Its proper divisors sum to 158,392, more than the number itself, making it an abundant number. Written other ways, in hexadecimal, 0x21CF8.
Interestingness
Properties
- Parity
- Even
- Digit count
- 6
- Digit sum
- 32
- Digit product
- 6,144
- Digital root
- 5
- Palindrome
- No
- Bit width
- 18 bits
- Reversed
- 884,831
- Recamán's sequence
- a(491,851) = 138,488
- Square (n²)
- 19,178,926,144
- Cube (n³)
- 2,656,051,123,830,272
- Divisor count
- 16
- σ(n) — sum of divisors
- 296,880
- φ(n) — Euler's totient
- 59,328
- Sum of prime factors
- 2,486
Primality
Prime factorization: 2 3 × 7 × 2473
Divisors & multiples
Sums & aliquot sequence
Continued fraction of √n
√138,488 = [372; (7, 6, 2, 3, 1, 16, 7, 6, 106, 6, 7, 16, 1, 3, 2, 6, 7, 744)]
Period length 18 — the block in parentheses repeats forever.
Representations
- In words
- one hundred thirty-eight thousand four hundred eighty-eight
- Ordinal
- 138488th
- Binary
- 100001110011111000
- Octal
- 416370
- Hexadecimal
- 0x21CF8
- Base64
- Ahz4
- One's complement
- 4,294,828,807 (32-bit)
- Scientific notation
- 1.38488 × 10⁵
- As a duration
- 138,488 s = 1 day, 14 hours, 28 minutes, 8 seconds
As an angle
Historical numeral systems
- Babylonian (base 60)
- 𒌋𒌋𒌋𒁹𒁹𒁹𒁹𒁹𒁹𒁹𒁹 𒌋𒌋𒁹𒁹𒁹𒁹𒁹𒁹𒁹𒁹 𒁹𒁹𒁹𒁹𒁹𒁹𒁹𒁹
- Egyptian hieroglyphic
- 𓆐𓂍𓂍𓂍𓆼𓆼𓆼𓆼𓆼𓆼𓆼𓆼𓍢𓍢𓍢𓍢𓎆𓎆𓎆𓎆𓎆𓎆𓎆𓎆𓏺𓏺𓏺𓏺𓏺𓏺𓏺𓏺
- Greek (Milesian)
- ͵ρληυπηʹ
- Mayan (base 20)
- 𝋱·𝋦·𝋤·𝋨
- Chinese
- 一十三萬八千四百八十八
- Chinese (financial)
- 壹拾參萬捌仟肆佰捌拾捌
Also seen as
Goldbach's conjecture says every even integer greater than 2 is the sum of two primes. For 138488, here are decompositions:
- 19 + 138469 = 138488
- 37 + 138451 = 138488
- 61 + 138427 = 138488
- 139 + 138349 = 138488
- 151 + 138337 = 138488
- 199 + 138289 = 138488
- 241 + 138247 = 138488
- 307 + 138181 = 138488
Showing the first eight; more decompositions exist.
UTF-8 encoding: F0 A1 B3 B8 (4 bytes).
As an unsigned 32-bit integer, this is the IPv4 address 0.2.28.248.
- Address
- 0.2.28.248
- Class
- reserved
- IPv4-mapped IPv6
- ::ffff:0.2.28.248
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 138,488 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.