189,720
189,720 is a composite number, even.
189,720 (one hundred eighty-nine thousand seven hundred twenty) is an even 6-digit number. It is a composite number with 96 divisors, and factors as 2³ × 3² × 5 × 17 × 31. Its proper divisors sum to 484,200, more than the number itself, making it an abundant number. Written other ways, in hexadecimal, 0x2E518.
Interestingness
Properties
- Parity
- Even
- Digit count
- 6
- Digit sum
- 27
- Digit product
- 0
- Digital root
- 9
- Palindrome
- No
- Bit width
- 18 bits
- Reversed
- 27,981
- Recamán's sequence
- a(167,388) = 189,720
- Square (n²)
- 35,993,678,400
- Cube (n³)
- 6,828,720,666,048,000
- Divisor count
- 96
- σ(n) — sum of divisors
- 673,920
- φ(n) — Euler's totient
- 46,080
- Sum of prime factors
- 65
Primality
Prime factorization: 2 3 × 3 2 × 5 × 17 × 31
Divisors & multiples
Sums & aliquot sequence
Continued fraction of √n
√189,720 = [435; (1, 1, 3, 6, 1, 10, 1, 1, 2, 96, 2, 1, 1, 10, 1, 6, 3, 1, 1, 870)]
Period length 20 — the block in parentheses repeats forever.
Representations
- In words
- one hundred eighty-nine thousand seven hundred twenty
- Ordinal
- 189720th
- Binary
- 101110010100011000
- Octal
- 562430
- Hexadecimal
- 0x2E518
- Base64
- AuUY
- One's complement
- 4,294,777,575 (32-bit)
- Scientific notation
- 1.8972 × 10⁵
- As a duration
- 189,720 s = 2 days, 4 hours, 42 minutes
As an angle
Historical numeral systems
- Babylonian (base 60)
- 𒌋𒌋𒌋𒌋𒌋𒁹𒁹 𒌋𒌋𒌋𒌋𒁹𒁹 ·
- Egyptian hieroglyphic
- 𓆐𓂍𓂍𓂍𓂍𓂍𓂍𓂍𓂍𓆼𓆼𓆼𓆼𓆼𓆼𓆼𓆼𓆼𓍢𓍢𓍢𓍢𓍢𓍢𓍢𓎆𓎆
- Greek (Milesian)
- ͵ρπθψκʹ
- Chinese
- 十八萬九千七百二十
- Chinese (financial)
- 壹拾捌萬玖仟柒佰貳拾
Also seen as
Goldbach's conjecture says every even integer greater than 2 is the sum of two primes. For 189720, here are decompositions:
- 7 + 189713 = 189720
- 19 + 189701 = 189720
- 23 + 189697 = 189720
- 29 + 189691 = 189720
- 59 + 189661 = 189720
- 67 + 189653 = 189720
- 101 + 189619 = 189720
- 103 + 189617 = 189720
Showing the first eight; more decompositions exist.
UTF-8 encoding: F0 AE 94 98 (4 bytes).
As an unsigned 32-bit integer, this is the IPv4 address 0.2.229.24.
- Address
- 0.2.229.24
- Class
- reserved
- IPv4-mapped IPv6
- ::ffff:0.2.229.24
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 189,720 and was likely granted around 1875.
Patent numbers below 100,000 are excluded as too ambiguous; modern numbering currently reaches roughly 12.5 million.
Related reading
- Babylonian numerals — The base-60 cuneiform system that gave us 60 minutes, 60 seconds, and 360°.