998,640
998,640 is a composite number, even.
998,640 (nine hundred ninety-eight thousand six hundred forty) is an even 6-digit number. It is a composite number with 120 divisors, and factors as 2⁴ × 3² × 5 × 19 × 73. Its proper divisors sum to 2,580,000, more than the number itself, making it an abundant number. Written other ways, in hexadecimal, 0xF3CF0.
Interestingness
Properties
- Parity
- Even
- Digit count
- 6
- Digit sum
- 36
- Digit product
- 0
- Digital root
- 9
- Palindrome
- No
- Bit width
- 20 bits
- Reversed
- 46,899
- Square (n²)
- 997,281,849,600
- Cube (n³)
- 995,925,546,284,544,000
- Divisor count
- 120
- σ(n) — sum of divisors
- 3,578,640
- φ(n) — Euler's totient
- 248,832
- Sum of prime factors
- 111
Primality
Prime factorization: 2 4 × 3 2 × 5 × 19 × 73
Divisors & multiples
Sums & aliquot sequence
Continued fraction of √n
√998,640 = [999; (3, 7, 1, 6, 28, 222, 28, 6, 1, 7, 3, 1998)]
Period length 12 — the block in parentheses repeats forever.
Representations
- In words
- nine hundred ninety-eight thousand six hundred forty
- Ordinal
- 998640th
- Binary
- 11110011110011110000
- Octal
- 3636360
- Hexadecimal
- 0xF3CF0
- Base64
- Dzzw
- One's complement
- 4,293,968,655 (32-bit)
- Scientific notation
- 9.9864 × 10⁵
- As a duration
- 998,640 s = 11 days, 13 hours, 24 minutes
As an angle
Historical numeral systems
- Babylonian (base 60)
- 𒁹𒁹𒁹𒁹 𒌋𒌋𒌋𒁹𒁹𒁹𒁹𒁹𒁹𒁹 𒌋𒌋𒁹𒁹𒁹𒁹 ·
- Egyptian hieroglyphic
- 𓆐𓆐𓆐𓆐𓆐𓆐𓆐𓆐𓆐𓂍𓂍𓂍𓂍𓂍𓂍𓂍𓂍𓂍𓆼𓆼𓆼𓆼𓆼𓆼𓆼𓆼𓍢𓍢𓍢𓍢𓍢𓍢𓎆𓎆𓎆𓎆
- Greek (Milesian)
- ͵ϡϟηχμʹ
- Chinese
- 九十九萬八千六百四十
- Chinese (financial)
- 玖拾玖萬捌仟陸佰肆拾
Also seen as
Goldbach's conjecture says every even integer greater than 2 is the sum of two primes. For 998640, here are decompositions:
- 7 + 998633 = 998640
- 11 + 998629 = 998640
- 17 + 998623 = 998640
- 23 + 998617 = 998640
- 79 + 998561 = 998640
- 89 + 998551 = 998640
- 101 + 998539 = 998640
- 103 + 998537 = 998640
Showing the first eight; more decompositions exist.
As an unsigned 32-bit integer, this is the IPv4 address 0.15.60.240.
- Address
- 0.15.60.240
- Class
- reserved
- IPv4-mapped IPv6
- ::ffff:0.15.60.240
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 998,640 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°.