990,000
990,000 is a composite number, even.
990,000 (nine hundred ninety thousand) is an even 6-digit number. It is a composite number with 150 divisors, and factors as 2⁴ × 3² × 5⁴ × 11. Its proper divisors sum to 2,786,916, more than the number itself, making it an abundant number. Written other ways, in hexadecimal, 0xF1B30.
Interestingness
Properties
- Parity
- Even
- Digit count
- 6
- Digit sum
- 18
- Digit product
- 0
- Digital root
- 9
- Palindrome
- No
- Bit width
- 20 bits
- Reversed
- 99
- Flips to (rotate 180°)
- 66
- Square (n²)
- 980,100,000,000
- Cube (n³)
- 970,299,000,000,000,000
- Divisor count
- 150
- σ(n) — sum of divisors
- 3,776,916
- φ(n) — Euler's totient
- 240,000
- Sum of prime factors
- 45
Primality
Prime factorization: 2 4 × 3 2 × 5 4 × 11
Divisors & multiples
Sums & aliquot sequence
Continued fraction of √n
√990,000 = [994; (1, 78, 1, 1, 2, 79, 5, 79, 2, 1, 1, 78, 1, 1988)]
Period length 14 — the block in parentheses repeats forever.
Representations
- In words
- nine hundred ninety thousand
- Ordinal
- 990000th
- Binary
- 11110001101100110000
- Octal
- 3615460
- Hexadecimal
- 0xF1B30
- Base64
- Dxsw
- One's complement
- 4,293,977,295 (32-bit)
- Scientific notation
- 9.9 × 10⁵
- As a duration
- 990,000 s = 11 days, 11 hours
As an angle
Historical numeral systems
- Babylonian (base 60)
- 𒁹𒁹𒁹𒁹 𒌋𒌋𒌋𒁹𒁹𒁹𒁹𒁹 · ·
- Egyptian hieroglyphic
- 𓆐𓆐𓆐𓆐𓆐𓆐𓆐𓆐𓆐𓂍𓂍𓂍𓂍𓂍𓂍𓂍𓂍𓂍
- Greek (Milesian)
- ͵ϡϟ
- Chinese
- 九十九萬
- Chinese (financial)
- 玖拾玖萬
Also seen as
Goldbach's conjecture says every even integer greater than 2 is the sum of two primes. For 990000, here are decompositions:
- 19 + 989981 = 990000
- 23 + 989977 = 990000
- 29 + 989971 = 990000
- 41 + 989959 = 990000
- 61 + 989939 = 990000
- 71 + 989929 = 990000
- 79 + 989921 = 990000
- 83 + 989917 = 990000
Showing the first eight; more decompositions exist.
As an unsigned 32-bit integer, this is the IPv4 address 0.15.27.48.
- Address
- 0.15.27.48
- Class
- reserved
- IPv4-mapped IPv6
- ::ffff:0.15.27.48
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 990,000 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°.