11,720
11,720 is a composite number, even.
11,720 (eleven thousand seven hundred twenty) is an even 5-digit number. It is a composite number with 16 divisors, and factors as 2³ × 5 × 293. Its proper divisors sum to 14,740, more than the number itself, making it an abundant number. Written other ways, in hexadecimal, 0x2DC8.
Interestingness
Properties
- Parity
- Even
- Digit count
- 5
- Digit sum
- 11
- Digit product
- 0
- Digital root
- 2
- Palindrome
- No
- Bit width
- 14 bits
- Reversed
- 2,711
- Recamán's sequence
- a(23,344) = 11,720
- Square (n²)
- 137,358,400
- Cube (n³)
- 1,609,840,448,000
- Divisor count
- 16
- σ(n) — sum of divisors
- 26,460
- φ(n) — Euler's totient
- 4,672
- Sum of prime factors
- 304
Primality
Prime factorization: 2 3 × 5 × 293
Divisors & multiples
Sums & aliquot sequence
Continued fraction of √n
√11,720 = [108; (3, 1, 6, 4, 3, 1, 2, 3, 1, 1, 53, 1, 1, 3, 2, 1, 3, 4, 6, 1, 3, 216)]
Period length 22 — the block in parentheses repeats forever.
Representations
- In words
- eleven thousand seven hundred twenty
- Ordinal
- 11720th
- Binary
- 10110111001000
- Octal
- 26710
- Hexadecimal
- 0x2DC8
- Base64
- Lcg=
- One's complement
- 53,815 (16-bit)
- Scientific notation
- 1.172 × 10⁴
- As a duration
- 11,720 s = 3 hours, 15 minutes, 20 seconds
As an angle
Historical numeral systems
- Babylonian (base 60)
- 𒁹𒁹𒁹 𒌋𒁹𒁹𒁹𒁹𒁹 𒌋𒌋
- Egyptian hieroglyphic
- 𓂍𓆼𓍢𓍢𓍢𓍢𓍢𓍢𓍢𓎆𓎆
- Greek (Milesian)
- ͵ιαψκʹ
- Mayan (base 20)
- 𝋡·𝋩·𝋦·𝋠
- Chinese
- 一萬一千七百二十
- Chinese (financial)
- 壹萬壹仟柒佰貳拾
Digit at this position in famous constants
- π — Pi (π)
- Digit 11,720 = 4
- e — Euler's number (e)
- Digit 11,720 = 1
- φ — Golden ratio (φ)
- Digit 11,720 = 6
- √2 — Pythagoras's (√2)
- Digit 11,720 = 6
- ln 2 — Natural log of 2
- Digit 11,720 = 7
- γ — Euler-Mascheroni (γ)
- Digit 11,720 = 0
Also seen as
Goldbach's conjecture says every even integer greater than 2 is the sum of two primes. For 11720, here are decompositions:
- 3 + 11717 = 11720
- 19 + 11701 = 11720
- 31 + 11689 = 11720
- 43 + 11677 = 11720
- 103 + 11617 = 11720
- 127 + 11593 = 11720
- 193 + 11527 = 11720
- 223 + 11497 = 11720
Showing the first eight; more decompositions exist.
UTF-8 encoding: E2 B7 88 (3 bytes).
As an unsigned 32-bit integer, this is the IPv4 address 0.0.45.200.
- Address
- 0.0.45.200
- Class
- reserved
- IPv4-mapped IPv6
- ::ffff:0.0.45.200
Unspecified address (0.0.0.0/8) — "this network" placeholder.
Heard as a frequency, 11,720 Hz is closest to:
- Concert pitch (A4 = 440 Hz): F♯9 (11839.8 Hz, -18¢)
- Scientific pitch (C4 = 256 Hz): F♯9 (11585.2 Hz, +20¢)
- Baroque pitch (A4 = 415 Hz): G9 (11831.1 Hz, -16¢)
The digit sequence 11720 first appears in π at position 70,780 of the decimal expansion (the 70,780ordinal-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.