138,020
138,020 is a composite number, even.
138,020 (one hundred thirty-eight thousand twenty) is an even 6-digit number. It is a composite number with 24 divisors, and factors as 2² × 5 × 67 × 103. Its proper divisors sum to 159,004, more than the number itself, making it an abundant number. Written other ways, in hexadecimal, 0x21B24.
Interestingness
Properties
- Parity
- Even
- Digit count
- 6
- Digit sum
- 14
- Digit product
- 0
- Digital root
- 5
- Palindrome
- No
- Bit width
- 18 bits
- Reversed
- 20,831
- Recamán's sequence
- a(492,787) = 138,020
- Square (n²)
- 19,049,520,400
- Cube (n³)
- 2,629,214,805,608,000
- Divisor count
- 24
- σ(n) — sum of divisors
- 297,024
- φ(n) — Euler's totient
- 53,856
- Sum of prime factors
- 179
Primality
Prime factorization: 2 2 × 5 × 67 × 103
Divisors & multiples
Sums & aliquot sequence
Continued fraction of √n
√138,020 = [371; (1, 1, 23, 2, 7, 3, 67, 4, 2, 1, 1, 1, 1, 1, 2, 2, 1, 14, 2, 5, 1, 1, 1, 10, …)]
Representations
- In words
- one hundred thirty-eight thousand twenty
- Ordinal
- 138020th
- Binary
- 100001101100100100
- Octal
- 415444
- Hexadecimal
- 0x21B24
- Base64
- Ahsk
- One's complement
- 4,294,829,275 (32-bit)
- Scientific notation
- 1.3802 × 10⁵
- As a duration
- 138,020 s = 1 day, 14 hours, 20 minutes, 20 seconds
As an angle
Historical numeral systems
- Babylonian (base 60)
- 𒌋𒌋𒌋𒁹𒁹𒁹𒁹𒁹𒁹𒁹𒁹 𒌋𒌋 𒌋𒌋
- Egyptian hieroglyphic
- 𓆐𓂍𓂍𓂍𓆼𓆼𓆼𓆼𓆼𓆼𓆼𓆼𓎆𓎆
- Greek (Milesian)
- ͵ρληκʹ
- Mayan (base 20)
- 𝋱·𝋥·𝋡·𝋠
- Chinese
- 一十三萬八千零二十
- Chinese (financial)
- 壹拾參萬捌仟零貳拾
Also seen as
Goldbach's conjecture says every even integer greater than 2 is the sum of two primes. For 138020, here are decompositions:
- 13 + 138007 = 138020
- 37 + 137983 = 138020
- 73 + 137947 = 138020
- 79 + 137941 = 138020
- 109 + 137911 = 138020
- 151 + 137869 = 138020
- 193 + 137827 = 138020
- 229 + 137791 = 138020
Showing the first eight; more decompositions exist.
UTF-8 encoding: F0 A1 AC A4 (4 bytes).
As an unsigned 32-bit integer, this is the IPv4 address 0.2.27.36.
- Address
- 0.2.27.36
- Class
- reserved
- IPv4-mapped IPv6
- ::ffff:0.2.27.36
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 138,020 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 138020 first appears in π at position 292,194 of the decimal expansion (the 292,194ordinal-suffix:th 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.