138,500
138,500 is a composite number, even.
138,500 (one hundred thirty-eight thousand five hundred) is an even 6-digit number. It is a composite number with 24 divisors, and factors as 2² × 5³ × 277. Its proper divisors sum to 165,076, more than the number itself, making it an abundant number. Written other ways, in hexadecimal, 0x21D04.
Interestingness
Properties
- Parity
- Even
- Digit count
- 6
- Digit sum
- 17
- Digit product
- 0
- Digital root
- 8
- Palindrome
- No
- Bit width
- 18 bits
- Reversed
- 5,831
- Recamán's sequence
- a(491,827) = 138,500
- Square (n²)
- 19,182,250,000
- Cube (n³)
- 2,656,741,625,000,000
- Divisor count
- 24
- σ(n) — sum of divisors
- 303,576
- φ(n) — Euler's totient
- 55,200
- Sum of prime factors
- 296
Primality
Prime factorization: 2 2 × 5 3 × 277
Divisors & multiples
Sums & aliquot sequence
Continued fraction of √n
√138,500 = [372; (6, 2, 2, 2, 4, 8, 7, 3, 9, 9, 1, 2, 5, 2, 1, 29, 11, 1, 1, 2, 10, 11, 1, 1, …)]
Representations
- In words
- one hundred thirty-eight thousand five hundred
- Ordinal
- 138500th
- Binary
- 100001110100000100
- Octal
- 416404
- Hexadecimal
- 0x21D04
- Base64
- Ah0E
- One's complement
- 4,294,828,795 (32-bit)
- Scientific notation
- 1.385 × 10⁵
- As a duration
- 138,500 s = 1 day, 14 hours, 28 minutes, 20 seconds
As an angle
Historical numeral systems
- Babylonian (base 60)
- 𒌋𒌋𒌋𒁹𒁹𒁹𒁹𒁹𒁹𒁹𒁹 𒌋𒌋𒁹𒁹𒁹𒁹𒁹𒁹𒁹𒁹 𒌋𒌋
- Egyptian hieroglyphic
- 𓆐𓂍𓂍𓂍𓆼𓆼𓆼𓆼𓆼𓆼𓆼𓆼𓍢𓍢𓍢𓍢𓍢
- Greek (Milesian)
- ͵ρληφʹ
- Mayan (base 20)
- 𝋱·𝋦·𝋥·𝋠
- Chinese
- 一十三萬八千五百
- Chinese (financial)
- 壹拾參萬捌仟伍佰
Also seen as
Goldbach's conjecture says every even integer greater than 2 is the sum of two primes. For 138500, here are decompositions:
- 3 + 138497 = 138500
- 7 + 138493 = 138500
- 31 + 138469 = 138500
- 67 + 138433 = 138500
- 73 + 138427 = 138500
- 97 + 138403 = 138500
- 127 + 138373 = 138500
- 151 + 138349 = 138500
Showing the first eight; more decompositions exist.
UTF-8 encoding: F0 A1 B4 84 (4 bytes).
As an unsigned 32-bit integer, this is the IPv4 address 0.2.29.4.
- Address
- 0.2.29.4
- Class
- reserved
- IPv4-mapped IPv6
- ::ffff:0.2.29.4
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 138,500 and was likely granted around 1872.
Patent numbers below 100,000 are excluded as too ambiguous; modern numbering currently reaches roughly 12.5 million.
The digit sequence 138500 first appears in π at position 155,181 of the decimal expansion (the 155,181ordinal-suffix:st digit after the integer 3).
Search range: the first 1,000,000 fractional digits of π. Any 6-digit-or-shorter string is virtually guaranteed to appear in there — the more interesting signal is the position.
Related reading
- Mayan numerals — Vigesimal dots-and-bars with a shell zero — one of the earliest true zeros.