42,816
42,816 is a composite number, even.
42,816 (forty-two thousand eight hundred sixteen) is an even 5-digit number. It is a composite number with 28 divisors, and factors as 2⁶ × 3 × 223. Its proper divisors sum to 70,976, more than the number itself, making it an abundant number. Written other ways, in hexadecimal, 0xA740.
Interestingness
Properties
- Parity
- Even
- Digit count
- 5
- Digit sum
- 21
- Digit product
- 384
- Digital root
- 3
- Palindrome
- No
- Bit width
- 16 bits
- Reversed
- 61,824
- Recamán's sequence
- a(72,960) = 42,816
- Square (n²)
- 1,833,209,856
- Cube (n³)
- 78,490,713,194,496
- Divisor count
- 28
- σ(n) — sum of divisors
- 113,792
- φ(n) — Euler's totient
- 14,208
- Sum of prime factors
- 238
Primality
Prime factorization: 2 6 × 3 × 223
Divisors & multiples
Sums & aliquot sequence
Continued fraction of √n
√42,816 = [206; (1, 11, 1, 1, 5, 3, 4, 5, 2, 3, 2, 16, 8, 1, 1, 3, 1, 1, 1, 1, 3, 1, 2, 1, …)]
Representations
- In words
- forty-two thousand eight hundred sixteen
- Ordinal
- 42816th
- Binary
- 1010011101000000
- Octal
- 123500
- Hexadecimal
- 0xA740
- Base64
- p0A=
- One's complement
- 22,719 (16-bit)
- Scientific notation
- 4.2816 × 10⁴
- As a duration
- 42,816 s = 11 hours, 53 minutes, 36 seconds
As an angle
Historical numeral systems
- Babylonian (base 60)
- 𒌋𒁹 𒌋𒌋𒌋𒌋𒌋𒁹𒁹𒁹 𒌋𒌋𒌋𒁹𒁹𒁹𒁹𒁹𒁹
- Egyptian hieroglyphic
- 𓂍𓂍𓂍𓂍𓆼𓆼𓍢𓍢𓍢𓍢𓍢𓍢𓍢𓍢𓎆𓏺𓏺𓏺𓏺𓏺𓏺
- Greek (Milesian)
- ͵μβωιϛʹ
- Mayan (base 20)
- 𝋥·𝋧·𝋠·𝋰
- Chinese
- 四萬二千八百一十六
- Chinese (financial)
- 肆萬貳仟捌佰壹拾陸
Digit at this position in famous constants
- π — Pi (π)
- Digit 42,816 = 8
- e — Euler's number (e)
- Digit 42,816 = 8
- φ — Golden ratio (φ)
- Digit 42,816 = 8
- √2 — Pythagoras's (√2)
- Digit 42,816 = 7
- ln 2 — Natural log of 2
- Digit 42,816 = 8
- γ — Euler-Mascheroni (γ)
- Digit 42,816 = 1
Also seen as
Goldbach's conjecture says every even integer greater than 2 is the sum of two primes. For 42816, here are decompositions:
- 19 + 42797 = 42816
- 23 + 42793 = 42816
- 29 + 42787 = 42816
- 43 + 42773 = 42816
- 73 + 42743 = 42816
- 79 + 42737 = 42816
- 89 + 42727 = 42816
- 97 + 42719 = 42816
Showing the first eight; more decompositions exist.
UTF-8 encoding: EA 9D 80 (3 bytes).
As an unsigned 32-bit integer, this is the IPv4 address 0.0.167.64.
- Address
- 0.0.167.64
- Class
- reserved
- IPv4-mapped IPv6
- ::ffff:0.0.167.64
Unspecified address (0.0.0.0/8) — "this network" placeholder.
The digit sequence 42816 first appears in π at position 21,559 of the decimal expansion (the 21,559ordinal-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
- Babylonian numerals — The base-60 cuneiform system that gave us 60 minutes, 60 seconds, and 360°.