999,440
999,440 is a composite number, even.
999,440 (nine hundred ninety-nine thousand four hundred forty) is an even 6-digit number. It is a composite number with 60 divisors, and factors as 2⁴ × 5 × 13 × 31². Its proper divisors sum to 1,586,332, more than the number itself, making it an abundant number. Written other ways, in hexadecimal, 0xF4010.
Interestingness
Properties
- Parity
- Even
- Digit count
- 6
- Digit sum
- 35
- Digit product
- 0
- Digital root
- 8
- Palindrome
- No
- Bit width
- 20 bits
- Reversed
- 44,999
- Square (n²)
- 998,880,313,600
- Cube (n³)
- 998,320,940,624,384,000
- Divisor count
- 60
- σ(n) — sum of divisors
- 2,585,772
- φ(n) — Euler's totient
- 357,120
- Sum of prime factors
- 88
Primality
Prime factorization: 2 4 × 5 × 13 × 31 2
Divisors & multiples
Sums & aliquot sequence
Continued fraction of √n
√999,440 = [999; (1, 2, 1, 1, 3, 40, 1, 1, 9, 1, 1, 5, 1, 1, 4, 3, 1, 1, 1, 1, 1, 1, 2, 5, …)]
Representations
- In words
- nine hundred ninety-nine thousand four hundred forty
- Ordinal
- 999440th
- Binary
- 11110100000000010000
- Octal
- 3640020
- Hexadecimal
- 0xF4010
- Base64
- D0AQ
- One's complement
- 4,293,967,855 (32-bit)
- Scientific notation
- 9.9944 × 10⁵
- As a duration
- 999,440 s = 11 days, 13 hours, 37 minutes, 20 seconds
Historical numeral systems
- Babylonian (base 60)
- 𒁹𒁹𒁹𒁹 𒌋𒌋𒌋𒁹𒁹𒁹𒁹𒁹𒁹𒁹 𒌋𒌋𒌋𒁹𒁹𒁹𒁹𒁹𒁹𒁹 𒌋𒌋
- Egyptian hieroglyphic
- 𓆐𓆐𓆐𓆐𓆐𓆐𓆐𓆐𓆐𓂍𓂍𓂍𓂍𓂍𓂍𓂍𓂍𓂍𓆼𓆼𓆼𓆼𓆼𓆼𓆼𓆼𓆼𓍢𓍢𓍢𓍢𓎆𓎆𓎆𓎆
- Greek (Milesian)
- ͵ϡϟθυμʹ
- Chinese
- 九十九萬九千四百四十
- Chinese (financial)
- 玖拾玖萬玖仟肆佰肆拾
Also seen as
Goldbach's conjecture says every even integer greater than 2 is the sum of two primes. For 999440, here are decompositions:
- 3 + 999437 = 999440
- 7 + 999433 = 999440
- 109 + 999331 = 999440
- 223 + 999217 = 999440
- 241 + 999199 = 999440
- 271 + 999169 = 999440
- 307 + 999133 = 999440
- 349 + 999091 = 999440
Showing the first eight; more decompositions exist.
As an unsigned 32-bit integer, this is the IPv4 address 0.15.64.16.
- Address
- 0.15.64.16
- Class
- reserved
- IPv4-mapped IPv6
- ::ffff:0.15.64.16
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 999,440 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 999440 first appears in π at position 350,073 of the decimal expansion (the 350,073ordinal-suffix:rd 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°.