143,820
143,820 is a composite number, even.
143,820 (one hundred forty-three thousand eight hundred twenty) is an even 6-digit number. It is a composite number with 72 divisors, and factors as 2² × 3² × 5 × 17 × 47. Its proper divisors sum to 327,924, more than the number itself, making it an abundant number. Written other ways, in hexadecimal, 0x231CC.
Interestingness
Properties
- Parity
- Even
- Digit count
- 6
- Digit sum
- 18
- Digit product
- 0
- Digital root
- 9
- Palindrome
- No
- Bit width
- 18 bits
- Reversed
- 28,341
- Recamán's sequence
- a(220,776) = 143,820
- Square (n²)
- 20,684,192,400
- Cube (n³)
- 2,974,800,550,968,000
- Divisor count
- 72
- σ(n) — sum of divisors
- 471,744
- φ(n) — Euler's totient
- 35,328
- Sum of prime factors
- 79
Primality
Prime factorization: 2 2 × 3 2 × 5 × 17 × 47
Divisors & multiples
Sums & aliquot sequence
Continued fraction of √n
√143,820 = [379; (4, 4, 4, 4, 1, 188, 1, 4, 4, 4, 4, 758)]
Period length 12 — the block in parentheses repeats forever.
Representations
- In words
- one hundred forty-three thousand eight hundred twenty
- Ordinal
- 143820th
- Binary
- 100011000111001100
- Octal
- 430714
- Hexadecimal
- 0x231CC
- Base64
- AjHM
- One's complement
- 4,294,823,475 (32-bit)
- Scientific notation
- 1.4382 × 10⁵
- As a duration
- 143,820 s = 1 day, 15 hours, 57 minutes
As an angle
Historical numeral systems
- Babylonian (base 60)
- 𒌋𒌋𒌋𒁹𒁹𒁹𒁹𒁹𒁹𒁹𒁹𒁹 𒌋𒌋𒌋𒌋𒌋𒁹𒁹𒁹𒁹𒁹𒁹𒁹 ·
- Egyptian hieroglyphic
- 𓆐𓂍𓂍𓂍𓂍𓆼𓆼𓆼𓍢𓍢𓍢𓍢𓍢𓍢𓍢𓍢𓎆𓎆
- Greek (Milesian)
- ͵ρμγωκʹ
- Mayan (base 20)
- 𝋱·𝋳·𝋫·𝋠
- Chinese
- 一十四萬三千八百二十
- Chinese (financial)
- 壹拾肆萬參仟捌佰貳拾
Also seen as
Goldbach's conjecture says every even integer greater than 2 is the sum of two primes. For 143820, here are decompositions:
- 7 + 143813 = 143820
- 13 + 143807 = 143820
- 23 + 143797 = 143820
- 29 + 143791 = 143820
- 41 + 143779 = 143820
- 101 + 143719 = 143820
- 109 + 143711 = 143820
- 151 + 143669 = 143820
Showing the first eight; more decompositions exist.
UTF-8 encoding: F0 A3 87 8C (4 bytes).
As an unsigned 32-bit integer, this is the IPv4 address 0.2.49.204.
- Address
- 0.2.49.204
- Class
- reserved
- IPv4-mapped IPv6
- ::ffff:0.2.49.204
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 143,820 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 143820 first appears in π at position 908,015 of the decimal expansion (the 908,015ordinal-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°.