990,020
990,020 is a composite number, even.
990,020 (nine hundred ninety thousand twenty) is an even 6-digit number. It is a composite number with 24 divisors, and factors as 2² × 5 × 59 × 839. Its proper divisors sum to 1,126,780, more than the number itself, making it an abundant number. Written other ways, in hexadecimal, 0xF1B44.
Interestingness
Properties
- Parity
- Even
- Digit count
- 6
- Digit sum
- 20
- Digit product
- 0
- Digital root
- 2
- Palindrome
- No
- Bit width
- 20 bits
- Reversed
- 20,099
- Square (n²)
- 980,139,600,400
- Cube (n³)
- 970,357,807,188,008,000
- Divisor count
- 24
- σ(n) — sum of divisors
- 2,116,800
- φ(n) — Euler's totient
- 388,832
- Sum of prime factors
- 907
Primality
Prime factorization: 2 2 × 5 × 59 × 839
Divisors & multiples
Sums & aliquot sequence
Continued fraction of √n
√990,020 = [994; (1, 396, 1, 1988)]
Period length 4 — the block in parentheses repeats forever.
Representations
- In words
- nine hundred ninety thousand twenty
- Ordinal
- 990020th
- Binary
- 11110001101101000100
- Octal
- 3615504
- Hexadecimal
- 0xF1B44
- Base64
- DxtE
- One's complement
- 4,293,977,275 (32-bit)
- Scientific notation
- 9.9002 × 10⁵
- As a duration
- 990,020 s = 11 days, 11 hours, 20 seconds
As an angle
Historical numeral systems
- Babylonian (base 60)
- 𒁹𒁹𒁹𒁹 𒌋𒌋𒌋𒁹𒁹𒁹𒁹𒁹 · 𒌋𒌋
- Egyptian hieroglyphic
- 𓆐𓆐𓆐𓆐𓆐𓆐𓆐𓆐𓆐𓂍𓂍𓂍𓂍𓂍𓂍𓂍𓂍𓂍𓎆𓎆
- Greek (Milesian)
- ͵ϡϟκʹ
- Chinese
- 九十九萬零二十
- Chinese (financial)
- 玖拾玖萬零貳拾
Also seen as
Goldbach's conjecture says every even integer greater than 2 is the sum of two primes. For 990020, here are decompositions:
- 7 + 990013 = 990020
- 19 + 990001 = 990020
- 43 + 989977 = 990020
- 61 + 989959 = 990020
- 103 + 989917 = 990020
- 151 + 989869 = 990020
- 181 + 989839 = 990020
- 193 + 989827 = 990020
Showing the first eight; more decompositions exist.
As an unsigned 32-bit integer, this is the IPv4 address 0.15.27.68.
- Address
- 0.15.27.68
- Class
- reserved
- IPv4-mapped IPv6
- ::ffff:0.15.27.68
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 990,020 and was likely granted around 1911.
Patent numbers below 100,000 are excluded as too ambiguous; modern numbering currently reaches roughly 12.5 million.
The digit sequence 990020 first appears in π at position 34,055 of the decimal expansion (the 34,055ordinal-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°.