42,408
42,408 is a composite number, even.
42,408 (forty-two thousand four hundred eight) is an even 5-digit number. It is a composite number with 48 divisors, and factors as 2³ × 3² × 19 × 31. Its proper divisors sum to 82,392, more than the number itself, making it an abundant number. Written other ways, in hexadecimal, 0xA5A8.
Interestingness
Properties
- Parity
- Even
- Digit count
- 5
- Digit sum
- 18
- Digit product
- 0
- Digital root
- 9
- Palindrome
- No
- Bit width
- 16 bits
- Reversed
- 80,424
- Recamán's sequence
- a(150,807) = 42,408
- Square (n²)
- 1,798,438,464
- Cube (n³)
- 76,268,178,381,312
- Divisor count
- 48
- σ(n) — sum of divisors
- 124,800
- φ(n) — Euler's totient
- 12,960
- Sum of prime factors
- 62
Primality
Prime factorization: 2 3 × 3 2 × 19 × 31
Divisors & multiples
Sums & aliquot sequence
Continued fraction of √n
√42,408 = [205; (1, 13, 1, 2, 2, 7, 1, 44, 1, 7, 2, 2, 1, 13, 1, 410)]
Period length 16 — the block in parentheses repeats forever.
Representations
- In words
- forty-two thousand four hundred eight
- Ordinal
- 42408th
- Binary
- 1010010110101000
- Octal
- 122650
- Hexadecimal
- 0xA5A8
- Base64
- pag=
- One's complement
- 23,127 (16-bit)
- Scientific notation
- 4.2408 × 10⁴
- As a duration
- 42,408 s = 11 hours, 46 minutes, 48 seconds
As an angle
Historical numeral systems
- Babylonian (base 60)
- 𒌋𒁹 𒌋𒌋𒌋𒌋𒁹𒁹𒁹𒁹𒁹𒁹 𒌋𒌋𒌋𒌋𒁹𒁹𒁹𒁹𒁹𒁹𒁹𒁹
- Egyptian hieroglyphic
- 𓂍𓂍𓂍𓂍𓆼𓆼𓍢𓍢𓍢𓍢𓏺𓏺𓏺𓏺𓏺𓏺𓏺𓏺
- Greek (Milesian)
- ͵μβυηʹ
- Mayan (base 20)
- 𝋥·𝋦·𝋠·𝋨
- Chinese
- 四萬二千四百零八
- Chinese (financial)
- 肆萬貳仟肆佰零捌
Digit at this position in famous constants
- π — Pi (π)
- Digit 42,408 = 1
- e — Euler's number (e)
- Digit 42,408 = 5
- φ — Golden ratio (φ)
- Digit 42,408 = 1
- √2 — Pythagoras's (√2)
- Digit 42,408 = 3
- ln 2 — Natural log of 2
- Digit 42,408 = 8
- γ — Euler-Mascheroni (γ)
- Digit 42,408 = 6
Also seen as
Goldbach's conjecture says every even integer greater than 2 is the sum of two primes. For 42408, here are decompositions:
- 5 + 42403 = 42408
- 11 + 42397 = 42408
- 17 + 42391 = 42408
- 29 + 42379 = 42408
- 59 + 42349 = 42408
- 71 + 42337 = 42408
- 101 + 42307 = 42408
- 109 + 42299 = 42408
Showing the first eight; more decompositions exist.
UTF-8 encoding: EA 96 A8 (3 bytes).
As an unsigned 32-bit integer, this is the IPv4 address 0.0.165.168.
- Address
- 0.0.165.168
- Class
- reserved
- IPv4-mapped IPv6
- ::ffff:0.0.165.168
Unspecified address (0.0.0.0/8) — "this network" placeholder.
The digit sequence 42408 first appears in π at position 160,451 of the decimal expansion (the 160,451ordinal-suffix:st 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°.