491,400
491,400 is a composite number, even.
491,400 (four hundred ninety-one thousand four hundred) is an even 6-digit number. It is a composite number with 192 divisors, and factors as 2³ × 3³ × 5² × 7 × 13. Its proper divisors sum to 1,591,800, more than the number itself, making it an abundant number. Written other ways, in hexadecimal, 0x77F88.
Interestingness
Properties
Primality
Prime factorization: 2 3 × 3 3 × 5 2 × 7 × 13
Divisors & multiples
Sums & aliquot sequence
Continued fraction of √n
√491,400 = [700; (1, 1400)]
Period length 2 — the block in parentheses repeats forever.
Representations
- In words
- four hundred ninety-one thousand four hundred
- Ordinal
- 491400th
- Binary
- 1110111111110001000
- Octal
- 1677610
- Hexadecimal
- 0x77F88
- Base64
- B3+I
- One's complement
- 4,294,475,895 (32-bit)
- Scientific notation
- 4.914 × 10⁵
- As a duration
- 491,400 s = 5 days, 16 hours, 30 minutes
As an angle
Historical numeral systems
- Babylonian (base 60)
- 𒁹𒁹 𒌋𒁹𒁹𒁹𒁹𒁹𒁹 𒌋𒌋𒌋 ·
- Egyptian hieroglyphic
- 𓆐𓆐𓆐𓆐𓂍𓂍𓂍𓂍𓂍𓂍𓂍𓂍𓂍𓆼𓍢𓍢𓍢𓍢
- Greek (Milesian)
- ͵υϟαυʹ
- Chinese
- 四十九萬一千四百
- Chinese (financial)
- 肆拾玖萬壹仟肆佰
Also seen as
Goldbach's conjecture says every even integer greater than 2 is the sum of two primes. For 491400, here are decompositions:
- 23 + 491377 = 491400
- 29 + 491371 = 491400
- 43 + 491357 = 491400
- 47 + 491353 = 491400
- 59 + 491341 = 491400
- 61 + 491339 = 491400
- 67 + 491333 = 491400
- 71 + 491329 = 491400
Showing the first eight; more decompositions exist.
As an unsigned 32-bit integer, this is the IPv4 address 0.7.127.136.
- Address
- 0.7.127.136
- Class
- reserved
- IPv4-mapped IPv6
- ::ffff:0.7.127.136
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 491,400 and was likely granted around 1893.
Patent numbers below 100,000 are excluded as too ambiguous; modern numbering currently reaches roughly 12.5 million.
The digit sequence 491400 first appears in π at position 683,292 of the decimal expansion (the 683,292ordinal-suffix:nd 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°.