138,388
138,388 is a composite number, even.
138,388 (one hundred thirty-eight thousand three hundred eighty-eight) is an even 6-digit number. It is a composite number with 12 divisors, and factors as 2² × 29 × 1,193. Written other ways, in hexadecimal, 0x21C94.
Interestingness
Properties
- Parity
- Even
- Digit count
- 6
- Digit sum
- 31
- Digit product
- 4,608
- Digital root
- 4
- Palindrome
- No
- Bit width
- 18 bits
- Reversed
- 883,831
- Recamán's sequence
- a(492,051) = 138,388
- Square (n²)
- 19,151,238,544
- Cube (n³)
- 2,650,301,599,627,072
- Divisor count
- 12
- σ(n) — sum of divisors
- 250,740
- φ(n) — Euler's totient
- 66,752
- Sum of prime factors
- 1,226
Primality
Prime factorization: 2 2 × 29 × 1193
Divisors & multiples
Sums & aliquot sequence
Continued fraction of √n
√138,388 = [372; (186, 744)]
Period length 2 — the block in parentheses repeats forever.
Representations
- In words
- one hundred thirty-eight thousand three hundred eighty-eight
- Ordinal
- 138388th
- Binary
- 100001110010010100
- Octal
- 416224
- Hexadecimal
- 0x21C94
- Base64
- AhyU
- One's complement
- 4,294,828,907 (32-bit)
- Scientific notation
- 1.38388 × 10⁵
- As a duration
- 138,388 s = 1 day, 14 hours, 26 minutes, 28 seconds
As an angle
Historical numeral systems
- Babylonian (base 60)
- 𒌋𒌋𒌋𒁹𒁹𒁹𒁹𒁹𒁹𒁹𒁹 𒌋𒌋𒁹𒁹𒁹𒁹𒁹𒁹 𒌋𒌋𒁹𒁹𒁹𒁹𒁹𒁹𒁹𒁹
- Egyptian hieroglyphic
- 𓆐𓂍𓂍𓂍𓆼𓆼𓆼𓆼𓆼𓆼𓆼𓆼𓍢𓍢𓍢𓎆𓎆𓎆𓎆𓎆𓎆𓎆𓎆𓏺𓏺𓏺𓏺𓏺𓏺𓏺𓏺
- Greek (Milesian)
- ͵ρλητπηʹ
- Mayan (base 20)
- 𝋱·𝋥·𝋳·𝋨
- Chinese
- 一十三萬八千三百八十八
- Chinese (financial)
- 壹拾參萬捌仟參佰捌拾捌
Also seen as
Goldbach's conjecture says every even integer greater than 2 is the sum of two primes. For 138388, here are decompositions:
- 17 + 138371 = 138388
- 137 + 138251 = 138388
- 149 + 138239 = 138388
- 179 + 138209 = 138388
- 191 + 138197 = 138388
- 197 + 138191 = 138388
- 281 + 138107 = 138388
- 311 + 138077 = 138388
Showing the first eight; more decompositions exist.
UTF-8 encoding: F0 A1 B2 94 (4 bytes).
As an unsigned 32-bit integer, this is the IPv4 address 0.2.28.148.
- Address
- 0.2.28.148
- Class
- reserved
- IPv4-mapped IPv6
- ::ffff:0.2.28.148
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 138,388 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.