138,272
138,272 is a composite number, even.
138,272 (one hundred thirty-eight thousand two hundred seventy-two) is an even 6-digit number. It is a composite number with 24 divisors, and factors as 2⁵ × 29 × 149. Its proper divisors sum to 145,228, more than the number itself, making it an abundant number. Written other ways, in hexadecimal, 0x21C20.
Interestingness
Properties
- Parity
- Even
- Digit count
- 6
- Digit sum
- 23
- Digit product
- 672
- Digital root
- 5
- Palindrome
- No
- Bit width
- 18 bits
- Reversed
- 272,831
- Recamán's sequence
- a(492,283) = 138,272
- Square (n²)
- 19,119,145,984
- Cube (n³)
- 2,643,642,553,499,648
- Divisor count
- 24
- σ(n) — sum of divisors
- 283,500
- φ(n) — Euler's totient
- 66,304
- Sum of prime factors
- 188
Primality
Prime factorization: 2 5 × 29 × 149
Divisors & multiples
Sums & aliquot sequence
Continued fraction of √n
√138,272 = [371; (1, 5, 1, 1, 1, 3, 1, 3, 105, 1, 45, 2, 26, 15, 7, 6, 2, 185, 2, 6, 7, 15, 26, 2, …)]
Period length 36 — the block in parentheses repeats forever.
Representations
- In words
- one hundred thirty-eight thousand two hundred seventy-two
- Ordinal
- 138272nd
- Binary
- 100001110000100000
- Octal
- 416040
- Hexadecimal
- 0x21C20
- Base64
- Ahwg
- One's complement
- 4,294,829,023 (32-bit)
- Scientific notation
- 1.38272 × 10⁵
- As a duration
- 138,272 s = 1 day, 14 hours, 24 minutes, 32 seconds
As an angle
Historical numeral systems
- Babylonian (base 60)
- 𒌋𒌋𒌋𒁹𒁹𒁹𒁹𒁹𒁹𒁹𒁹 𒌋𒌋𒁹𒁹𒁹𒁹 𒌋𒌋𒌋𒁹𒁹
- Egyptian hieroglyphic
- 𓆐𓂍𓂍𓂍𓆼𓆼𓆼𓆼𓆼𓆼𓆼𓆼𓍢𓍢𓎆𓎆𓎆𓎆𓎆𓎆𓎆𓏺𓏺
- Greek (Milesian)
- ͵ρλησοβʹ
- Mayan (base 20)
- 𝋱·𝋥·𝋭·𝋬
- Chinese
- 一十三萬八千二百七十二
- Chinese (financial)
- 壹拾參萬捌仟貳佰柒拾貳
Also seen as
Goldbach's conjecture says every even integer greater than 2 is the sum of two primes. For 138272, here are decompositions:
- 31 + 138241 = 138272
- 109 + 138163 = 138272
- 193 + 138079 = 138272
- 331 + 137941 = 138272
- 613 + 137659 = 138272
- 619 + 137653 = 138272
- 829 + 137443 = 138272
- 859 + 137413 = 138272
Showing the first eight; more decompositions exist.
UTF-8 encoding: F0 A1 B0 A0 (4 bytes).
As an unsigned 32-bit integer, this is the IPv4 address 0.2.28.32.
- Address
- 0.2.28.32
- Class
- reserved
- IPv4-mapped IPv6
- ::ffff:0.2.28.32
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 138,272 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.