42,644
42,644 is a composite number, even.
42,644 (forty-two thousand six hundred forty-four) is an even 5-digit number. It is a composite number with 12 divisors, and factors as 2² × 7 × 1,523. Its proper divisors sum to 42,700, more than the number itself, making it an abundant number. Written other ways, in hexadecimal, 0xA694.
Interestingness
Properties
- Parity
- Even
- Digit count
- 5
- Digit sum
- 20
- Digit product
- 768
- Digital root
- 2
- Palindrome
- No
- Bit width
- 16 bits
- Reversed
- 44,624
- Recamán's sequence
- a(73,304) = 42,644
- Square (n²)
- 1,818,510,736
- Cube (n³)
- 77,548,571,825,984
- Divisor count
- 12
- σ(n) — sum of divisors
- 85,344
- φ(n) — Euler's totient
- 18,264
- Sum of prime factors
- 1,534
Primality
Prime factorization: 2 2 × 7 × 1523
Divisors & multiples
Sums & aliquot sequence
Continued fraction of √n
√42,644 = [206; (1, 1, 58, 1, 1, 412)]
Period length 6 — the block in parentheses repeats forever.
Representations
- In words
- forty-two thousand six hundred forty-four
- Ordinal
- 42644th
- Binary
- 1010011010010100
- Octal
- 123224
- Hexadecimal
- 0xA694
- Base64
- ppQ=
- One's complement
- 22,891 (16-bit)
- Scientific notation
- 4.2644 × 10⁴
- As a duration
- 42,644 s = 11 hours, 50 minutes, 44 seconds
As an angle
Historical numeral systems
- Babylonian (base 60)
- 𒌋𒁹 𒌋𒌋𒌋𒌋𒌋 𒌋𒌋𒌋𒌋𒁹𒁹𒁹𒁹
- Egyptian hieroglyphic
- 𓂍𓂍𓂍𓂍𓆼𓆼𓍢𓍢𓍢𓍢𓍢𓍢𓎆𓎆𓎆𓎆𓏺𓏺𓏺𓏺
- Greek (Milesian)
- ͵μβχμδʹ
- Mayan (base 20)
- 𝋥·𝋦·𝋬·𝋤
- Chinese
- 四萬二千六百四十四
- Chinese (financial)
- 肆萬貳仟陸佰肆拾肆
Digit at this position in famous constants
- π — Pi (π)
- Digit 42,644 = 2
- e — Euler's number (e)
- Digit 42,644 = 7
- φ — Golden ratio (φ)
- Digit 42,644 = 9
- √2 — Pythagoras's (√2)
- Digit 42,644 = 8
- ln 2 — Natural log of 2
- Digit 42,644 = 8
- γ — Euler-Mascheroni (γ)
- Digit 42,644 = 3
Also seen as
Goldbach's conjecture says every even integer greater than 2 is the sum of two primes. For 42644, here are decompositions:
- 3 + 42641 = 42644
- 67 + 42577 = 42644
- 73 + 42571 = 42644
- 157 + 42487 = 42644
- 181 + 42463 = 42644
- 193 + 42451 = 42644
- 211 + 42433 = 42644
- 241 + 42403 = 42644
Showing the first eight; more decompositions exist.
UTF-8 encoding: EA 9A 94 (3 bytes).
As an unsigned 32-bit integer, this is the IPv4 address 0.0.166.148.
- Address
- 0.0.166.148
- Class
- reserved
- IPv4-mapped IPv6
- ::ffff:0.0.166.148
Unspecified address (0.0.0.0/8) — "this network" placeholder.
The digit sequence 42644 first appears in π at position 122,972 of the decimal expansion (the 122,972ordinal-suffix:nd 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
- Mayan numerals — Vigesimal dots-and-bars with a shell zero — one of the earliest true zeros.