991,320
991,320 is a composite number, even.
991,320 (nine hundred ninety-one thousand three hundred twenty) is an even 6-digit number. It is a composite number with 64 divisors, and factors as 2³ × 3 × 5 × 11 × 751. Its proper divisors sum to 2,257,320, more than the number itself, making it an abundant number. Written other ways, in hexadecimal, 0xF2058.
Interestingness
Properties
- Parity
- Even
- Digit count
- 6
- Digit sum
- 24
- Digit product
- 0
- Digital root
- 6
- Palindrome
- No
- Bit width
- 20 bits
- Reversed
- 23,199
- Square (n²)
- 982,715,342,400
- Cube (n³)
- 974,185,373,227,968,000
- Divisor count
- 64
- σ(n) — sum of divisors
- 3,248,640
- φ(n) — Euler's totient
- 240,000
- Sum of prime factors
- 776
Primality
Prime factorization: 2 3 × 3 × 5 × 11 × 751
Divisors & multiples
Sums & aliquot sequence
Continued fraction of √n
√991,320 = [995; (1, 1, 1, 6, 4, 2, 7, 1, 7, 1, 2, 1, 4, 1, 4, 9, 1, 2, 3, 40, 2, 1, 16, 2, …)]
Period length 50 — the block in parentheses repeats forever.
Representations
- In words
- nine hundred ninety-one thousand three hundred twenty
- Ordinal
- 991320th
- Binary
- 11110010000001011000
- Octal
- 3620130
- Hexadecimal
- 0xF2058
- Base64
- DyBY
- One's complement
- 4,293,975,975 (32-bit)
- Scientific notation
- 9.9132 × 10⁵
- As a duration
- 991,320 s = 11 days, 11 hours, 22 minutes
As an angle
Historical numeral systems
- Babylonian (base 60)
- 𒁹𒁹𒁹𒁹 𒌋𒌋𒌋𒁹𒁹𒁹𒁹𒁹 𒌋𒌋𒁹𒁹 ·
- Egyptian hieroglyphic
- 𓆐𓆐𓆐𓆐𓆐𓆐𓆐𓆐𓆐𓂍𓂍𓂍𓂍𓂍𓂍𓂍𓂍𓂍𓆼𓍢𓍢𓍢𓎆𓎆
- Greek (Milesian)
- ͵ϡϟατκʹ
- Chinese
- 九十九萬一千三百二十
- Chinese (financial)
- 玖拾玖萬壹仟參佰貳拾
Also seen as
Goldbach's conjecture says every even integer greater than 2 is the sum of two primes. For 991320, here are decompositions:
- 7 + 991313 = 991320
- 47 + 991273 = 991320
- 59 + 991261 = 991320
- 97 + 991223 = 991320
- 103 + 991217 = 991320
- 139 + 991181 = 991320
- 149 + 991171 = 991320
- 173 + 991147 = 991320
Showing the first eight; more decompositions exist.
As an unsigned 32-bit integer, this is the IPv4 address 0.15.32.88.
- Address
- 0.15.32.88
- Class
- reserved
- IPv4-mapped IPv6
- ::ffff:0.15.32.88
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 991,320 and was likely granted around 1911.
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°.