490,640
490,640 is a composite number, even.
490,640 (four hundred ninety thousand six hundred forty) is an even 6-digit number. It is a composite number with 20 divisors, and factors as 2⁴ × 5 × 6,133. Its proper divisors sum to 650,284, more than the number itself, making it an abundant number. Written other ways, in hexadecimal, 0x77C90.
Interestingness
Properties
- Parity
- Even
- Digit count
- 6
- Digit sum
- 23
- Digit product
- 0
- Digital root
- 5
- Palindrome
- No
- Bit width
- 19 bits
- Reversed
- 46,094
- Square (n²)
- 240,727,609,600
- Cube (n³)
- 118,110,594,374,144,000
- Divisor count
- 20
- σ(n) — sum of divisors
- 1,140,924
- φ(n) — Euler's totient
- 196,224
- Sum of prime factors
- 6,146
Primality
Prime factorization: 2 4 × 5 × 6133
Divisors & multiples
Sums & aliquot sequence
Continued fraction of √n
√490,640 = [700; (2, 5, 3, 5, 6, 3, 19, 2, 2, 2, 3, 2, 17, 3, 2, 1, 2, 1, 1, 4, 2, 2, 5, 15, …)]
Period length 58 — the block in parentheses repeats forever.
Representations
- In words
- four hundred ninety thousand six hundred forty
- Ordinal
- 490640th
- Binary
- 1110111110010010000
- Octal
- 1676220
- Hexadecimal
- 0x77C90
- Base64
- B3yQ
- One's complement
- 4,294,476,655 (32-bit)
- Scientific notation
- 4.9064 × 10⁵
- As a duration
- 490,640 s = 5 days, 16 hours, 17 minutes, 20 seconds
As an angle
Historical numeral systems
- Babylonian (base 60)
- 𒁹𒁹 𒌋𒁹𒁹𒁹𒁹𒁹𒁹 𒌋𒁹𒁹𒁹𒁹𒁹𒁹𒁹 𒌋𒌋
- Egyptian hieroglyphic
- 𓆐𓆐𓆐𓆐𓂍𓂍𓂍𓂍𓂍𓂍𓂍𓂍𓂍𓍢𓍢𓍢𓍢𓍢𓍢𓎆𓎆𓎆𓎆
- Greek (Milesian)
- ͵υϟχμʹ
- Chinese
- 四十九萬零六百四十
- Chinese (financial)
- 肆拾玖萬零陸佰肆拾
Also seen as
Goldbach's conjecture says every even integer greater than 2 is the sum of two primes. For 490640, here are decompositions:
- 13 + 490627 = 490640
- 61 + 490579 = 490640
- 67 + 490573 = 490640
- 97 + 490543 = 490640
- 103 + 490537 = 490640
- 181 + 490459 = 490640
- 223 + 490417 = 490640
- 331 + 490309 = 490640
Showing the first eight; more decompositions exist.
As an unsigned 32-bit integer, this is the IPv4 address 0.7.124.144.
- Address
- 0.7.124.144
- Class
- reserved
- IPv4-mapped IPv6
- ::ffff:0.7.124.144
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 490,640 and was likely granted around 1892.
Patent numbers below 100,000 are excluded as too ambiguous; modern numbering currently reaches roughly 12.5 million.
The digit sequence 490640 first appears in π at position 602,354 of the decimal expansion (the 602,354ordinal-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°.