999,988
999,988 is a composite number, even.
Interestingness
Properties
- Parity
- Even
- Digit count
- 6
- Digit sum
- 52
- Digit product
- 419,904
- Digital root
- 7
- Palindrome
- No
- Bit width
- 20 bits
- Reversed
- 889,999
- Flips to (rotate 180°)
- 886,666
- Square (n²)
- 999,976,000,144
- Cube (n³)
- 999,964,000,431,998,272
- Divisor count
- 12
- σ(n) — sum of divisors
- 1,909,152
- φ(n) — Euler's totient
- 454,520
- Sum of prime factors
- 22,742
Primality
Prime factorization: 2 2 × 11 × 22727
Divisors & multiples
Sums & aliquot sequence
Continued fraction of √n
√999,988 = [999; (1, 165, 1, 1, 1, 221, 1, 1, 4, 18, 3, 2, 1, 1, 1, 24, 16, 4, 1, 1, 3, 1, 11, 2, …)]
Representations
- In words
- nine hundred ninety-nine thousand nine hundred eighty-eight
- Ordinal
- 999988th
- Binary
- 11110100001000110100
- Octal
- 3641064
- Hexadecimal
- 0xF4234
- Base64
- D0I0
- One's complement
- 4,293,967,307 (32-bit)
- Scientific notation
- 9.99988 × 10⁵
- As a duration
- 999,988 s = 11 days, 13 hours, 46 minutes, 28 seconds
Historical numeral systems
- Babylonian (base 60)
- 𒁹𒁹𒁹𒁹 𒌋𒌋𒌋𒁹𒁹𒁹𒁹𒁹𒁹𒁹 𒌋𒌋𒌋𒌋𒁹𒁹𒁹𒁹𒁹𒁹 𒌋𒌋𒁹𒁹𒁹𒁹𒁹𒁹𒁹𒁹
- Egyptian hieroglyphic
- 𓆐𓆐𓆐𓆐𓆐𓆐𓆐𓆐𓆐𓂍𓂍𓂍𓂍𓂍𓂍𓂍𓂍𓂍𓆼𓆼𓆼𓆼𓆼𓆼𓆼𓆼𓆼𓍢𓍢𓍢𓍢𓍢𓍢𓍢𓍢𓍢𓎆𓎆𓎆𓎆𓎆𓎆𓎆𓎆𓏺𓏺𓏺𓏺𓏺𓏺𓏺𓏺
- Greek (Milesian)
- ͵ϡϟθϡπηʹ
- Chinese
- 九十九萬九千九百八十八
- Chinese (financial)
- 玖拾玖萬玖仟玖佰捌拾捌
Also seen as
Goldbach's conjecture says every even integer greater than 2 is the sum of two primes. For 999988, here are decompositions:
- 5 + 999983 = 999988
- 29 + 999959 = 999988
- 71 + 999917 = 999988
- 179 + 999809 = 999988
- 239 + 999749 = 999988
- 317 + 999671 = 999988
- 389 + 999599 = 999988
- 467 + 999521 = 999988
Showing the first eight; more decompositions exist.
As an unsigned 32-bit integer, this is the IPv4 address 0.15.66.52.
- Address
- 0.15.66.52
- Class
- reserved
- IPv4-mapped IPv6
- ::ffff:0.15.66.52
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 999,988 and was likely granted around 1911.
Patent numbers below 100,000 are excluded as too ambiguous; modern numbering currently reaches roughly 12.5 million.
This passes the ABA routing number checksum and matches the Federal Reserve numbering scheme.
Banks operate many routing numbers per state and division; an unmatched checksum-valid number can still be a real RTN at a smaller institution.