138,572
138,572 is a composite number, even.
138,572 (one hundred thirty-eight thousand five hundred seventy-two) is an even 6-digit number. It is a composite number with 24 divisors, and factors as 2² × 7³ × 101. Its proper divisors sum to 147,028, more than the number itself, making it an abundant number. Written other ways, in hexadecimal, 0x21D4C.
Interestingness
Properties
- Parity
- Even
- Digit count
- 6
- Digit sum
- 26
- Digit product
- 1,680
- Digital root
- 8
- Palindrome
- No
- Bit width
- 18 bits
- Reversed
- 275,831
- Recamán's sequence
- a(491,683) = 138,572
- Square (n²)
- 19,202,199,184
- Cube (n³)
- 2,660,887,145,325,248
- Divisor count
- 24
- σ(n) — sum of divisors
- 285,600
- φ(n) — Euler's totient
- 58,800
- Sum of prime factors
- 126
Primality
Prime factorization: 2 2 × 7 3 × 101
Divisors & multiples
Sums & aliquot sequence
Continued fraction of √n
√138,572 = [372; (3, 1, 23, 3, 1, 3, 9, 1, 1, 7, 1, 14, 3, 4, 1, 2, 2, 1, 1, 1, 1, 3, 5, 2, …)]
Representations
- In words
- one hundred thirty-eight thousand five hundred seventy-two
- Ordinal
- 138572nd
- Binary
- 100001110101001100
- Octal
- 416514
- Hexadecimal
- 0x21D4C
- Base64
- Ah1M
- One's complement
- 4,294,828,723 (32-bit)
- Scientific notation
- 1.38572 × 10⁵
- As a duration
- 138,572 s = 1 day, 14 hours, 29 minutes, 32 seconds
As an angle
Historical numeral systems
- Babylonian (base 60)
- 𒌋𒌋𒌋𒁹𒁹𒁹𒁹𒁹𒁹𒁹𒁹 𒌋𒌋𒁹𒁹𒁹𒁹𒁹𒁹𒁹𒁹𒁹 𒌋𒌋𒌋𒁹𒁹
- Egyptian hieroglyphic
- 𓆐𓂍𓂍𓂍𓆼𓆼𓆼𓆼𓆼𓆼𓆼𓆼𓍢𓍢𓍢𓍢𓍢𓎆𓎆𓎆𓎆𓎆𓎆𓎆𓏺𓏺
- Greek (Milesian)
- ͵ρληφοβʹ
- Mayan (base 20)
- 𝋱·𝋦·𝋨·𝋬
- Chinese
- 一十三萬八千五百七十二
- Chinese (financial)
- 壹拾參萬捌仟伍佰柒拾貳
Also seen as
Goldbach's conjecture says every even integer greater than 2 is the sum of two primes. For 138572, here are decompositions:
- 3 + 138569 = 138572
- 13 + 138559 = 138572
- 61 + 138511 = 138572
- 79 + 138493 = 138572
- 103 + 138469 = 138572
- 139 + 138433 = 138572
- 199 + 138373 = 138572
- 223 + 138349 = 138572
Showing the first eight; more decompositions exist.
UTF-8 encoding: F0 A1 B5 8C (4 bytes).
As an unsigned 32-bit integer, this is the IPv4 address 0.2.29.76.
- Address
- 0.2.29.76
- Class
- reserved
- IPv4-mapped IPv6
- ::ffff:0.2.29.76
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 138,572 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.