42,838
42,838 is a composite number, even.
42,838 (forty-two thousand eight hundred thirty-eight) is an even 5-digit number. It is a composite number with 4 divisors, and factors as 2 × 21,419. Written other ways, in hexadecimal, 0xA756.
Interestingness
Properties
- Parity
- Even
- Digit count
- 5
- Digit sum
- 25
- Digit product
- 1,536
- Digital root
- 7
- Palindrome
- No
- Bit width
- 16 bits
- Reversed
- 83,824
- Recamán's sequence
- a(72,916) = 42,838
- Square (n²)
- 1,835,094,244
- Cube (n³)
- 78,611,767,224,472
- Divisor count
- 4
- σ(n) — sum of divisors
- 64,260
- φ(n) — Euler's totient
- 21,418
- Sum of prime factors
- 21,421
Primality
Prime factorization: 2 × 21419
Divisors & multiples
Sums & aliquot sequence
Continued fraction of √n
√42,838 = [206; (1, 36, 1, 1, 1, 2, 1, 2, 1, 2, 3, 1, 2, 1, 2, 1, 4, 12, 3, 137, 1, 1, 1, 11, …)]
Representations
- In words
- forty-two thousand eight hundred thirty-eight
- Ordinal
- 42838th
- Binary
- 1010011101010110
- Octal
- 123526
- Hexadecimal
- 0xA756
- Base64
- p1Y=
- One's complement
- 22,697 (16-bit)
- Scientific notation
- 4.2838 × 10⁴
- As a duration
- 42,838 s = 11 hours, 53 minutes, 58 seconds
As an angle
Historical numeral systems
- Babylonian (base 60)
- 𒌋𒁹 𒌋𒌋𒌋𒌋𒌋𒁹𒁹𒁹 𒌋𒌋𒌋𒌋𒌋𒁹𒁹𒁹𒁹𒁹𒁹𒁹𒁹
- Egyptian hieroglyphic
- 𓂍𓂍𓂍𓂍𓆼𓆼𓍢𓍢𓍢𓍢𓍢𓍢𓍢𓍢𓎆𓎆𓎆𓏺𓏺𓏺𓏺𓏺𓏺𓏺𓏺
- Greek (Milesian)
- ͵μβωληʹ
- Mayan (base 20)
- 𝋥·𝋧·𝋡·𝋲
- Chinese
- 四萬二千八百三十八
- Chinese (financial)
- 肆萬貳仟捌佰參拾捌
Digit at this position in famous constants
- π — Pi (π)
- Digit 42,838 = 1
- e — Euler's number (e)
- Digit 42,838 = 0
- φ — Golden ratio (φ)
- Digit 42,838 = 0
- √2 — Pythagoras's (√2)
- Digit 42,838 = 9
- ln 2 — Natural log of 2
- Digit 42,838 = 0
- γ — Euler-Mascheroni (γ)
- Digit 42,838 = 5
Also seen as
Goldbach's conjecture says every even integer greater than 2 is the sum of two primes. For 42838, here are decompositions:
- 17 + 42821 = 42838
- 41 + 42797 = 42838
- 71 + 42767 = 42838
- 101 + 42737 = 42838
- 137 + 42701 = 42838
- 149 + 42689 = 42838
- 197 + 42641 = 42838
- 227 + 42611 = 42838
Showing the first eight; more decompositions exist.
UTF-8 encoding: EA 9D 96 (3 bytes).
As an unsigned 32-bit integer, this is the IPv4 address 0.0.167.86.
- Address
- 0.0.167.86
- Class
- reserved
- IPv4-mapped IPv6
- ::ffff:0.0.167.86
Unspecified address (0.0.0.0/8) — "this network" placeholder.
The digit sequence 42838 first appears in π at position 120,779 of the decimal expansion (the 120,779ordinal-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.