165,920
165,920 is a composite number, even.
165,920 (one hundred sixty-five thousand nine hundred twenty) is an even 6-digit number. It is a composite number with 48 divisors, and factors as 2⁵ × 5 × 17 × 61. Its proper divisors sum to 255,928, more than the number itself, making it an abundant number. Written other ways, in hexadecimal, 0x28820.
Interestingness
Properties
- Parity
- Even
- Digit count
- 6
- Digit sum
- 23
- Digit product
- 0
- Digital root
- 5
- Palindrome
- No
- Bit width
- 18 bits
- Reversed
- 29,561
- Recamán's sequence
- a(196,152) = 165,920
- Square (n²)
- 27,529,446,400
- Cube (n³)
- 4,567,685,746,688,000
- Divisor count
- 48
- σ(n) — sum of divisors
- 421,848
- φ(n) — Euler's totient
- 61,440
- Sum of prime factors
- 93
Primality
Prime factorization: 2 5 × 5 × 17 × 61
Divisors & multiples
Sums & aliquot sequence
Continued fraction of √n
√165,920 = [407; (3, 203, 3, 814)]
Period length 4 — the block in parentheses repeats forever.
Representations
- In words
- one hundred sixty-five thousand nine hundred twenty
- Ordinal
- 165920th
- Binary
- 101000100000100000
- Octal
- 504040
- Hexadecimal
- 0x28820
- Base64
- Aogg
- One's complement
- 4,294,801,375 (32-bit)
- Scientific notation
- 1.6592 × 10⁵
- As a duration
- 165,920 s = 1 day, 22 hours, 5 minutes, 20 seconds
As an angle
Historical numeral systems
- Babylonian (base 60)
- 𒌋𒌋𒌋𒌋𒁹𒁹𒁹𒁹𒁹𒁹 𒁹𒁹𒁹𒁹𒁹 𒌋𒌋
- Egyptian hieroglyphic
- 𓆐𓂍𓂍𓂍𓂍𓂍𓂍𓆼𓆼𓆼𓆼𓆼𓍢𓍢𓍢𓍢𓍢𓍢𓍢𓍢𓍢𓎆𓎆
- Greek (Milesian)
- ͵ρξεϡκʹ
- Chinese
- 一十六萬五千九百二十
- Chinese (financial)
- 壹拾陸萬伍仟玖佰貳拾
Also seen as
Goldbach's conjecture says every even integer greater than 2 is the sum of two primes. For 165920, here are decompositions:
- 19 + 165901 = 165920
- 37 + 165883 = 165920
- 43 + 165877 = 165920
- 103 + 165817 = 165920
- 109 + 165811 = 165920
- 199 + 165721 = 165920
- 211 + 165709 = 165920
- 331 + 165589 = 165920
Showing the first eight; more decompositions exist.
UTF-8 encoding: F0 A8 A0 A0 (4 bytes).
As an unsigned 32-bit integer, this is the IPv4 address 0.2.136.32.
- Address
- 0.2.136.32
- Class
- reserved
- IPv4-mapped IPv6
- ::ffff:0.2.136.32
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 165,920 and was likely granted around 1874.
Patent numbers below 100,000 are excluded as too ambiguous; modern numbering currently reaches roughly 12.5 million.
The digit sequence 165920 first appears in π at position 899,780 of the decimal expansion (the 899,780ordinal-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°.