18,140
18,140 is a composite number, even.
18,140 (eighteen thousand one hundred forty) is an even 5-digit number. It is a composite number with 12 divisors, and factors as 2² × 5 × 907. Its proper divisors sum to 19,996, more than the number itself, making it an abundant number. Written other ways, in hexadecimal, 0x46DC.
Interestingness
Properties
- Parity
- Even
- Digit count
- 5
- Digit sum
- 14
- Digit product
- 0
- Digital root
- 5
- Palindrome
- No
- Bit width
- 15 bits
- Reversed
- 4,181
- Recamán's sequence
- a(15,564) = 18,140
- Square (n²)
- 329,059,600
- Cube (n³)
- 5,969,141,144,000
- Divisor count
- 12
- σ(n) — sum of divisors
- 38,136
- φ(n) — Euler's totient
- 7,248
- Sum of prime factors
- 916
Primality
Prime factorization: 2 2 × 5 × 907
Divisors & multiples
Sums & aliquot sequence
Continued fraction of √n
√18,140 = [134; (1, 2, 5, 1, 3, 1, 2, 1, 1, 1, 1, 1, 1, 6, 8, 1, 1, 6, 24, 2, 1, 66, 1, 2, …)]
Period length 44 — the block in parentheses repeats forever.
Representations
- In words
- eighteen thousand one hundred forty
- Ordinal
- 18140th
- Binary
- 100011011011100
- Octal
- 43334
- Hexadecimal
- 0x46DC
- Base64
- Rtw=
- One's complement
- 47,395 (16-bit)
- Scientific notation
- 1.814 × 10⁴
- As a duration
- 18,140 s = 5 hours, 2 minutes, 20 seconds
As an angle
Historical numeral systems
- Babylonian (base 60)
- 𒁹𒁹𒁹𒁹𒁹 𒁹𒁹 𒌋𒌋
- Egyptian hieroglyphic
- 𓂍𓆼𓆼𓆼𓆼𓆼𓆼𓆼𓆼𓍢𓎆𓎆𓎆𓎆
- Greek (Milesian)
- ͵ιηρμʹ
- Mayan (base 20)
- 𝋢·𝋥·𝋧·𝋠
- Chinese
- 一萬八千一百四十
- Chinese (financial)
- 壹萬捌仟壹佰肆拾
Digit at this position in famous constants
- π — Pi (π)
- Digit 18,140 = 8
- e — Euler's number (e)
- Digit 18,140 = 5
- φ — Golden ratio (φ)
- Digit 18,140 = 8
- √2 — Pythagoras's (√2)
- Digit 18,140 = 3
- ln 2 — Natural log of 2
- Digit 18,140 = 3
- γ — Euler-Mascheroni (γ)
- Digit 18,140 = 3
Also seen as
Goldbach's conjecture says every even integer greater than 2 is the sum of two primes. For 18140, here are decompositions:
- 7 + 18133 = 18140
- 13 + 18127 = 18140
- 19 + 18121 = 18140
- 43 + 18097 = 18140
- 79 + 18061 = 18140
- 97 + 18043 = 18140
- 127 + 18013 = 18140
- 151 + 17989 = 18140
Showing the first eight; more decompositions exist.
UTF-8 encoding: E4 9B 9C (3 bytes).
As an unsigned 32-bit integer, this is the IPv4 address 0.0.70.220.
- Address
- 0.0.70.220
- Class
- reserved
- IPv4-mapped IPv6
- ::ffff:0.0.70.220
Unspecified address (0.0.0.0/8) — "this network" placeholder.
Heard as a frequency, 18,140 Hz is closest to:
- Concert pitch (A4 = 440 Hz): C♯10 (17739.7 Hz, +39¢)
- Scientific pitch (C4 = 256 Hz): D10 (18390.4 Hz, -24¢)
- Baroque pitch (A4 = 415 Hz): D10 (17726.7 Hz, +40¢)
The digit sequence 18140 first appears in π at position 134,135 of the decimal expansion (the 134,135ordinal-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.