13,440
13,440 is a composite number, even.
Properties
- Parity
- Even
- Digit count
- 5
- Digit sum
- 12
- Digit product
- 0
- Digital root
- 3
- Palindrome
- No
- Bit width
- 14 bits
- Reversed
- 4,431
- Recamán's sequence
- a(47,395) = 13,440
- Square (n²)
- 180,633,600
- Cube (n³)
- 2,427,715,584,000
- Divisor count
- 64
- σ(n) — sum of divisors
- 48,960
- φ(n) — Euler's totient
- 3,072
- Sum of prime factors
- 29
Primality
Prime factorization: 2 7 × 3 × 5 × 7
Divisors & multiples
Sums & aliquot sequence
Representations
- In words
- thirteen thousand four hundred forty
- Ordinal
- 13440th
- Binary
- 11010010000000
- Octal
- 32200
- Hexadecimal
- 0x3480
- Base64
- NIA=
- One's complement
- 52,095 (16-bit)
Historical numeral systems
- Babylonian (base 60)
- 𒁹𒁹𒁹 𒌋𒌋𒌋𒌋𒁹𒁹𒁹𒁹 ·
- Egyptian hieroglyphic
- 𓂍𓆼𓆼𓆼𓍢𓍢𓍢𓍢𓎆𓎆𓎆𓎆
- Greek (Milesian)
- ͵ιγυμʹ
- Mayan (base 20)
- 𝋡·𝋭·𝋬·𝋠
- Chinese
- 一萬三千四百四十
- Chinese (financial)
- 壹萬參仟肆佰肆拾
Digit at this position in famous constants
- π — Pi (π)
- Digit 13,440 = 4
- e — Euler's number (e)
- Digit 13,440 = 8
- φ — Golden ratio (φ)
- Digit 13,440 = 9
- √2 — Pythagoras's (√2)
- Digit 13,440 = 7
- ln 2 — Natural log of 2
- Digit 13,440 = 8
- γ — Euler-Mascheroni (γ)
- Digit 13,440 = 5
Also seen as
Goldbach's conjecture says every even integer greater than 2 is the sum of two primes. For 13440, here are decompositions:
- 19 + 13421 = 13440
- 23 + 13417 = 13440
- 29 + 13411 = 13440
- 41 + 13399 = 13440
- 43 + 13397 = 13440
- 59 + 13381 = 13440
- 73 + 13367 = 13440
- 101 + 13339 = 13440
Showing the first eight; more decompositions exist.
UTF-8 encoding: E3 92 80 (3 bytes).
As an unsigned 32-bit integer, this is the IPv4 address 0.0.52.128.
- Address
- 0.0.52.128
- Class
- reserved
- IPv4-mapped IPv6
- ::ffff:0.0.52.128
Unspecified address (0.0.0.0/8) — "this network" placeholder.
This passes the ABA routing number checksum and matches the Federal Reserve numbering scheme.
Banks operate many routing numbers per state and division; an unmatched checksum-valid number can still be a real RTN at a smaller institution.
The digit sequence 13440 first appears in π at position 4,213 of the decimal expansion (the 4,213ordinal-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.