42,840
42,840 is a composite number, even.
Properties
- Parity
- Even
- Digit count
- 5
- Digit sum
- 18
- Digit product
- 0
- Digital root
- 9
- Palindrome
- No
- Bit width
- 16 bits
- Reversed
- 4,824
- Recamán's sequence
- a(72,912) = 42,840
- Square (n²)
- 1,835,265,600
- Cube (n³)
- 78,622,778,304,000
- Divisor count
- 96
- σ(n) — sum of divisors
- 168,480
- φ(n) — Euler's totient
- 9,216
- Sum of prime factors
- 41
Primality
Prime factorization: 2 3 × 3 2 × 5 × 7 × 17
Divisors & multiples
Sums & aliquot sequence
Representations
- In words
- forty-two thousand eight hundred forty
- Ordinal
- 42840th
- Binary
- 1010011101011000
- Octal
- 123530
- Hexadecimal
- 0xA758
- Base64
- p1g=
- One's complement
- 22,695 (16-bit)
Historical numeral systems
- Babylonian (base 60)
- 𒌋𒁹 𒌋𒌋𒌋𒌋𒌋𒁹𒁹𒁹𒁹 ·
- Egyptian hieroglyphic
- 𓂍𓂍𓂍𓂍𓆼𓆼𓍢𓍢𓍢𓍢𓍢𓍢𓍢𓍢𓎆𓎆𓎆𓎆
- Greek (Milesian)
- ͵μβωμʹ
- Mayan (base 20)
- 𝋥·𝋧·𝋢·𝋠
- Chinese
- 四萬二千八百四十
- Chinese (financial)
- 肆萬貳仟捌佰肆拾
Digit at this position in famous constants
- π — Pi (π)
- Digit 42,840 = 0
- e — Euler's number (e)
- Digit 42,840 = 9
- φ — Golden ratio (φ)
- Digit 42,840 = 1
- √2 — Pythagoras's (√2)
- Digit 42,840 = 0
- ln 2 — Natural log of 2
- Digit 42,840 = 9
- γ — Euler-Mascheroni (γ)
- Digit 42,840 = 6
Also seen as
Goldbach's conjecture says every even integer greater than 2 is the sum of two primes. For 42840, here are decompositions:
- 11 + 42829 = 42840
- 19 + 42821 = 42840
- 43 + 42797 = 42840
- 47 + 42793 = 42840
- 53 + 42787 = 42840
- 67 + 42773 = 42840
- 73 + 42767 = 42840
- 89 + 42751 = 42840
Showing the first eight; more decompositions exist.
UTF-8 encoding: EA 9D 98 (3 bytes).
As an unsigned 32-bit integer, this is the IPv4 address 0.0.167.88.
- Address
- 0.0.167.88
- Class
- reserved
- IPv4-mapped IPv6
- ::ffff:0.0.167.88
Unspecified address (0.0.0.0/8) — "this network" placeholder.
The digit sequence 42840 first appears in π at position 70,449 of the decimal expansion (the 70,449ordinal-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.