42,820
42,820 is a composite number, even.
Properties
- Parity
- Even
- Digit count
- 5
- Digit sum
- 16
- Digit product
- 0
- Digital root
- 7
- Palindrome
- No
- Bit width
- 16 bits
- Reversed
- 2,824
- Recamán's sequence
- a(72,952) = 42,820
- Square (n²)
- 1,833,552,400
- Cube (n³)
- 78,512,713,768,000
- Divisor count
- 12
- σ(n) — sum of divisors
- 89,964
- φ(n) — Euler's totient
- 17,120
- Sum of prime factors
- 2,150
Primality
Prime factorization: 2 2 × 5 × 2141
Divisors & multiples
Sums & aliquot sequence
Representations
- In words
- forty-two thousand eight hundred twenty
- Ordinal
- 42820th
- Binary
- 1010011101000100
- Octal
- 123504
- Hexadecimal
- 0xA744
- Base64
- p0Q=
- One's complement
- 22,715 (16-bit)
Historical numeral systems
- Babylonian (base 60)
- 𒌋𒁹 𒌋𒌋𒌋𒌋𒌋𒁹𒁹𒁹 𒌋𒌋𒌋𒌋
- Egyptian hieroglyphic
- 𓂍𓂍𓂍𓂍𓆼𓆼𓍢𓍢𓍢𓍢𓍢𓍢𓍢𓍢𓎆𓎆
- Greek (Milesian)
- ͵μβωκʹ
- Mayan (base 20)
- 𝋥·𝋧·𝋡·𝋠
- Chinese
- 四萬二千八百二十
- Chinese (financial)
- 肆萬貳仟捌佰貳拾
Digit at this position in famous constants
- π — Pi (π)
- Digit 42,820 = 9
- e — Euler's number (e)
- Digit 42,820 = 1
- φ — Golden ratio (φ)
- Digit 42,820 = 6
- √2 — Pythagoras's (√2)
- Digit 42,820 = 1
- ln 2 — Natural log of 2
- Digit 42,820 = 5
- γ — Euler-Mascheroni (γ)
- Digit 42,820 = 5
Also seen as
Goldbach's conjecture says every even integer greater than 2 is the sum of two primes. For 42820, here are decompositions:
- 23 + 42797 = 42820
- 47 + 42773 = 42820
- 53 + 42767 = 42820
- 83 + 42737 = 42820
- 101 + 42719 = 42820
- 131 + 42689 = 42820
- 137 + 42683 = 42820
- 179 + 42641 = 42820
Showing the first eight; more decompositions exist.
UTF-8 encoding: EA 9D 84 (3 bytes).
As an unsigned 32-bit integer, this is the IPv4 address 0.0.167.68.
- Address
- 0.0.167.68
- Class
- reserved
- IPv4-mapped IPv6
- ::ffff:0.0.167.68
Unspecified address (0.0.0.0/8) — "this network" placeholder.
The digit sequence 42820 first appears in π at position 32,375 of the decimal expansion (the 32,375ordinal-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.