143,840
143,840 is a composite number, even.
143,840 (one hundred forty-three thousand eight hundred forty) is an even 6-digit number. It is a composite number with 48 divisors, and factors as 2⁵ × 5 × 29 × 31. Its proper divisors sum to 219,040, more than the number itself, making it an abundant number. Written other ways, in hexadecimal, 0x231E0.
Interestingness
Properties
- Parity
- Even
- Digit count
- 6
- Digit sum
- 20
- Digit product
- 0
- Digital root
- 2
- Palindrome
- No
- Bit width
- 18 bits
- Reversed
- 48,341
- Recamán's sequence
- a(220,736) = 143,840
- Square (n²)
- 20,689,945,600
- Cube (n³)
- 2,976,041,775,104,000
- Divisor count
- 48
- σ(n) — sum of divisors
- 362,880
- φ(n) — Euler's totient
- 53,760
- Sum of prime factors
- 75
Primality
Prime factorization: 2 5 × 5 × 29 × 31
Divisors & multiples
Sums & aliquot sequence
Continued fraction of √n
√143,840 = [379; (3, 1, 4, 3, 1, 1, 1, 14, 1, 5, 3, 189, 3, 5, 1, 14, 1, 1, 1, 3, 4, 1, 3, 758)]
Period length 24 — the block in parentheses repeats forever.
Representations
- In words
- one hundred forty-three thousand eight hundred forty
- Ordinal
- 143840th
- Binary
- 100011000111100000
- Octal
- 430740
- Hexadecimal
- 0x231E0
- Base64
- AjHg
- One's complement
- 4,294,823,455 (32-bit)
- Scientific notation
- 1.4384 × 10⁵
- As a duration
- 143,840 s = 1 day, 15 hours, 57 minutes, 20 seconds
As an angle
Historical numeral systems
- Babylonian (base 60)
- 𒌋𒌋𒌋𒁹𒁹𒁹𒁹𒁹𒁹𒁹𒁹𒁹 𒌋𒌋𒌋𒌋𒌋𒁹𒁹𒁹𒁹𒁹𒁹𒁹 𒌋𒌋
- Egyptian hieroglyphic
- 𓆐𓂍𓂍𓂍𓂍𓆼𓆼𓆼𓍢𓍢𓍢𓍢𓍢𓍢𓍢𓍢𓎆𓎆𓎆𓎆
- Greek (Milesian)
- ͵ρμγωμʹ
- Mayan (base 20)
- 𝋱·𝋳·𝋬·𝋠
- Chinese
- 一十四萬三千八百四十
- Chinese (financial)
- 壹拾肆萬參仟捌佰肆拾
Also seen as
Goldbach's conjecture says every even integer greater than 2 is the sum of two primes. For 143840, here are decompositions:
- 7 + 143833 = 143840
- 13 + 143827 = 143840
- 19 + 143821 = 143840
- 43 + 143797 = 143840
- 61 + 143779 = 143840
- 97 + 143743 = 143840
- 163 + 143677 = 143840
- 211 + 143629 = 143840
Showing the first eight; more decompositions exist.
UTF-8 encoding: F0 A3 87 A0 (4 bytes).
As an unsigned 32-bit integer, this is the IPv4 address 0.2.49.224.
- Address
- 0.2.49.224
- Class
- reserved
- IPv4-mapped IPv6
- ::ffff:0.2.49.224
Unspecified address (0.0.0.0/8) — "this network" placeholder.
This number falls in the range of US utility patent numbers. If it's a patent, it would be issued as US 143,840 and was likely granted around 1873.
Patent numbers below 100,000 are excluded as too ambiguous; modern numbering currently reaches roughly 12.5 million.
The digit sequence 143840 first appears in π at position 9,640 of the decimal expansion (the 9,640ordinal-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
- Mayan numerals — Vigesimal dots-and-bars with a shell zero — one of the earliest true zeros.