13,640
13,640 is a composite number, even.
Properties
- Parity
- Even
- Digit count
- 5
- Digit sum
- 14
- Digit product
- 0
- Digital root
- 5
- Palindrome
- No
- Bit width
- 14 bits
- Reversed
- 4,631
- Recamán's sequence
- a(4,052) = 13,640
- Square (n²)
- 186,049,600
- Cube (n³)
- 2,537,716,544,000
- Divisor count
- 32
- σ(n) — sum of divisors
- 34,560
- φ(n) — Euler's totient
- 4,800
- Sum of prime factors
- 53
Primality
Prime factorization: 2 3 × 5 × 11 × 31
Divisors & multiples
Sums & aliquot sequence
Representations
- In words
- thirteen thousand six hundred forty
- Ordinal
- 13640th
- Binary
- 11010101001000
- Octal
- 32510
- Hexadecimal
- 0x3548
- Base64
- NUg=
- One's complement
- 51,895 (16-bit)
Historical numeral systems
- Babylonian (base 60)
- 𒁹𒁹𒁹 𒌋𒌋𒌋𒌋𒁹𒁹𒁹𒁹𒁹𒁹𒁹 𒌋𒌋
- Egyptian hieroglyphic
- 𓂍𓆼𓆼𓆼𓍢𓍢𓍢𓍢𓍢𓍢𓎆𓎆𓎆𓎆
- Greek (Milesian)
- ͵ιγχμʹ
- Mayan (base 20)
- 𝋡·𝋮·𝋢·𝋠
- Chinese
- 一萬三千六百四十
- Chinese (financial)
- 壹萬參仟陸佰肆拾
Digit at this position in famous constants
- π — Pi (π)
- Digit 13,640 = 3
- e — Euler's number (e)
- Digit 13,640 = 7
- φ — Golden ratio (φ)
- Digit 13,640 = 5
- √2 — Pythagoras's (√2)
- Digit 13,640 = 1
- ln 2 — Natural log of 2
- Digit 13,640 = 5
- γ — Euler-Mascheroni (γ)
- Digit 13,640 = 5
Also seen as
Goldbach's conjecture says every even integer greater than 2 is the sum of two primes. For 13640, here are decompositions:
- 7 + 13633 = 13640
- 13 + 13627 = 13640
- 43 + 13597 = 13640
- 73 + 13567 = 13640
- 103 + 13537 = 13640
- 127 + 13513 = 13640
- 163 + 13477 = 13640
- 199 + 13441 = 13640
Showing the first eight; more decompositions exist.
UTF-8 encoding: E3 95 88 (3 bytes).
As an unsigned 32-bit integer, this is the IPv4 address 0.0.53.72.
- Address
- 0.0.53.72
- Class
- reserved
- IPv4-mapped IPv6
- ::ffff:0.0.53.72
Unspecified address (0.0.0.0/8) — "this network" placeholder.
The digit sequence 13640 first appears in π at position 97,213 of the decimal expansion (the 97,213ordinal-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.