138,722
138,722 is a composite number, even.
138,722 (one hundred thirty-eight thousand seven hundred twenty-two) is an even 6-digit number. It is a composite number with 8 divisors, and factors as 2 × 139 × 499. Written other ways, in hexadecimal, 0x21DE2.
Interestingness
Properties
- Parity
- Even
- Digit count
- 6
- Digit sum
- 23
- Digit product
- 672
- Digital root
- 5
- Palindrome
- No
- Bit width
- 18 bits
- Reversed
- 227,831
- Recamán's sequence
- a(491,383) = 138,722
- Square (n²)
- 19,243,793,284
- Cube (n³)
- 2,669,537,491,943,048
- Divisor count
- 8
- σ(n) — sum of divisors
- 210,000
- φ(n) — Euler's totient
- 68,724
- Sum of prime factors
- 640
Primality
Prime factorization: 2 × 139 × 499
Divisors & multiples
Sums & aliquot sequence
Continued fraction of √n
√138,722 = [372; (2, 4, 1, 15, 32, 3, 11, 1, 2, 5, 1, 4, 2, 1, 2, 1, 1, 1, 7, 21, 1, 3, 1, 1, …)]
Representations
- In words
- one hundred thirty-eight thousand seven hundred twenty-two
- Ordinal
- 138722nd
- Binary
- 100001110111100010
- Octal
- 416742
- Hexadecimal
- 0x21DE2
- Base64
- Ah3i
- One's complement
- 4,294,828,573 (32-bit)
- Scientific notation
- 1.38722 × 10⁵
- As a duration
- 138,722 s = 1 day, 14 hours, 32 minutes, 2 seconds
As an angle
Historical numeral systems
- Babylonian (base 60)
- 𒌋𒌋𒌋𒁹𒁹𒁹𒁹𒁹𒁹𒁹𒁹 𒌋𒌋𒌋𒁹𒁹 𒁹𒁹
- Egyptian hieroglyphic
- 𓆐𓂍𓂍𓂍𓆼𓆼𓆼𓆼𓆼𓆼𓆼𓆼𓍢𓍢𓍢𓍢𓍢𓍢𓍢𓎆𓎆𓏺𓏺
- Greek (Milesian)
- ͵ρληψκβʹ
- Mayan (base 20)
- 𝋱·𝋦·𝋰·𝋢
- Chinese
- 一十三萬八千七百二十二
- Chinese (financial)
- 壹拾參萬捌仟柒佰貳拾貳
Also seen as
Goldbach's conjecture says every even integer greater than 2 is the sum of two primes. For 138722, here are decompositions:
- 43 + 138679 = 138722
- 61 + 138661 = 138722
- 151 + 138571 = 138722
- 163 + 138559 = 138722
- 211 + 138511 = 138722
- 229 + 138493 = 138722
- 271 + 138451 = 138722
- 349 + 138373 = 138722
Showing the first eight; more decompositions exist.
UTF-8 encoding: F0 A1 B7 A2 (4 bytes).
As an unsigned 32-bit integer, this is the IPv4 address 0.2.29.226.
- Address
- 0.2.29.226
- Class
- reserved
- IPv4-mapped IPv6
- ::ffff:0.2.29.226
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 138,722 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.