13,438
13,438 is a composite number, even.
13,438 (thirteen thousand four hundred thirty-eight) is an even 5-digit number. It is a composite number with 4 divisors, and factors as 2 × 6,719. Written other ways, in hexadecimal, 0x347E.
Interestingness
Properties
- Parity
- Even
- Digit count
- 5
- Digit sum
- 19
- Digit product
- 288
- Digital root
- 1
- Palindrome
- No
- Bit width
- 14 bits
- Reversed
- 83,431
- Recamán's sequence
- a(47,399) = 13,438
- Square (n²)
- 180,579,844
- Cube (n³)
- 2,426,631,943,672
- Divisor count
- 4
- σ(n) — sum of divisors
- 20,160
- φ(n) — Euler's totient
- 6,718
- Sum of prime factors
- 6,721
Primality
Prime factorization: 2 × 6719
Divisors & multiples
Sums & aliquot sequence
Continued fraction of √n
√13,438 = [115; (1, 11, 1, 7, 1, 1, 1, 37, 1, 76, 3, 3, 1, 24, 1, 114, 1, 24, 1, 3, 3, 76, 1, 37, …)]
Period length 32 — the block in parentheses repeats forever.
Representations
- In words
- thirteen thousand four hundred thirty-eight
- Ordinal
- 13438th
- Binary
- 11010001111110
- Octal
- 32176
- Hexadecimal
- 0x347E
- Base64
- NH4=
- One's complement
- 52,097 (16-bit)
- Scientific notation
- 1.3438 × 10⁴
- As a duration
- 13,438 s = 3 hours, 43 minutes, 58 seconds
As an angle
Historical numeral systems
- Babylonian (base 60)
- 𒁹𒁹𒁹 𒌋𒌋𒌋𒌋𒁹𒁹𒁹 𒌋𒌋𒌋𒌋𒌋𒁹𒁹𒁹𒁹𒁹𒁹𒁹𒁹
- Egyptian hieroglyphic
- 𓂍𓆼𓆼𓆼𓍢𓍢𓍢𓍢𓎆𓎆𓎆𓏺𓏺𓏺𓏺𓏺𓏺𓏺𓏺
- Greek (Milesian)
- ͵ιγυληʹ
- Mayan (base 20)
- 𝋡·𝋭·𝋫·𝋲
- Chinese
- 一萬三千四百三十八
- Chinese (financial)
- 壹萬參仟肆佰參拾捌
Digit at this position in famous constants
- π — Pi (π)
- Digit 13,438 = 3
- e — Euler's number (e)
- Digit 13,438 = 3
- φ — Golden ratio (φ)
- Digit 13,438 = 6
- √2 — Pythagoras's (√2)
- Digit 13,438 = 7
- ln 2 — Natural log of 2
- Digit 13,438 = 7
- γ — Euler-Mascheroni (γ)
- Digit 13,438 = 2
Also seen as
Goldbach's conjecture says every even integer greater than 2 is the sum of two primes. For 13438, here are decompositions:
- 17 + 13421 = 13438
- 41 + 13397 = 13438
- 71 + 13367 = 13438
- 101 + 13337 = 13438
- 107 + 13331 = 13438
- 179 + 13259 = 13438
- 197 + 13241 = 13438
- 251 + 13187 = 13438
Showing the first eight; more decompositions exist.
UTF-8 encoding: E3 91 BE (3 bytes).
As an unsigned 32-bit integer, this is the IPv4 address 0.0.52.126.
- Address
- 0.0.52.126
- Class
- reserved
- IPv4-mapped IPv6
- ::ffff:0.0.52.126
Unspecified address (0.0.0.0/8) — "this network" placeholder.
Heard as a frequency, 13,438 Hz is closest to:
- Concert pitch (A4 = 440 Hz): G♯9 (13289.8 Hz, +19¢)
- Scientific pitch (C4 = 256 Hz): A9 (13777.2 Hz, -43¢)
- Baroque pitch (A4 = 415 Hz): A9 (13280 Hz, +20¢)
The digit sequence 13438 first appears in π at position 27,666 of the decimal expansion (the 27,666ordinal-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
- Egyptian hieroglyphic numerals — Seven hieroglyphs for every power of ten, from a single stroke to a million.