17,990
17,990 is a composite number, even.
17,990 (seventeen thousand nine hundred ninety) is an even 5-digit number. It is a composite number with 16 divisors, and factors as 2 × 5 × 7 × 257. Its proper divisors sum to 19,162, more than the number itself, making it an abundant number. Written other ways, in hexadecimal, 0x4646.
Interestingness
Properties
- Parity
- Even
- Digit count
- 5
- Digit sum
- 26
- Digit product
- 0
- Digital root
- 8
- Palindrome
- No
- Bit width
- 15 bits
- Reversed
- 9,971
- Recamán's sequence
- a(8,244) = 17,990
- Square (n²)
- 323,640,100
- Cube (n³)
- 5,822,285,399,000
- Divisor count
- 16
- σ(n) — sum of divisors
- 37,152
- φ(n) — Euler's totient
- 6,144
- Sum of prime factors
- 271
Primality
Prime factorization: 2 × 5 × 7 × 257
Divisors & multiples
Sums & aliquot sequence
Continued fraction of √n
√17,990 = [134; (7, 1, 7, 1, 3, 1, 1, 23, 1, 4, 1, 6, 1, 4, 1, 23, 1, 1, 3, 1, 7, 1, 7, 268)]
Period length 24 — the block in parentheses repeats forever.
Representations
- In words
- seventeen thousand nine hundred ninety
- Ordinal
- 17990th
- Binary
- 100011001000110
- Octal
- 43106
- Hexadecimal
- 0x4646
- Base64
- RkY=
- One's complement
- 47,545 (16-bit)
- Scientific notation
- 1.799 × 10⁴
- As a duration
- 17,990 s = 4 hours, 59 minutes, 50 seconds
As an angle
Historical numeral systems
- Babylonian (base 60)
- 𒁹𒁹𒁹𒁹 𒌋𒌋𒌋𒌋𒌋𒁹𒁹𒁹𒁹𒁹𒁹𒁹𒁹𒁹 𒌋𒌋𒌋𒌋𒌋
- Egyptian hieroglyphic
- 𓂍𓆼𓆼𓆼𓆼𓆼𓆼𓆼𓍢𓍢𓍢𓍢𓍢𓍢𓍢𓍢𓍢𓎆𓎆𓎆𓎆𓎆𓎆𓎆𓎆𓎆
- Greek (Milesian)
- ͵ιζϡϟʹ
- Mayan (base 20)
- 𝋢·𝋤·𝋳·𝋪
- Chinese
- 一萬七千九百九十
- Chinese (financial)
- 壹萬柒仟玖佰玖拾
Digit at this position in famous constants
- π — Pi (π)
- Digit 17,990 = 9
- e — Euler's number (e)
- Digit 17,990 = 3
- φ — Golden ratio (φ)
- Digit 17,990 = 8
- √2 — Pythagoras's (√2)
- Digit 17,990 = 6
- ln 2 — Natural log of 2
- Digit 17,990 = 6
- γ — Euler-Mascheroni (γ)
- Digit 17,990 = 9
Also seen as
Goldbach's conjecture says every even integer greater than 2 is the sum of two primes. For 17990, here are decompositions:
- 3 + 17987 = 17990
- 13 + 17977 = 17990
- 19 + 17971 = 17990
- 31 + 17959 = 17990
- 61 + 17929 = 17990
- 67 + 17923 = 17990
- 79 + 17911 = 17990
- 109 + 17881 = 17990
Showing the first eight; more decompositions exist.
UTF-8 encoding: E4 99 86 (3 bytes).
As an unsigned 32-bit integer, this is the IPv4 address 0.0.70.70.
- Address
- 0.0.70.70
- Class
- reserved
- IPv4-mapped IPv6
- ::ffff:0.0.70.70
Unspecified address (0.0.0.0/8) — "this network" placeholder.
Heard as a frequency, 17,990 Hz is closest to:
- Concert pitch (A4 = 440 Hz): C♯10 (17739.7 Hz, +24¢)
- Scientific pitch (C4 = 256 Hz): D10 (18390.4 Hz, -38¢)
- Baroque pitch (A4 = 415 Hz): D10 (17726.7 Hz, +26¢)
The digit sequence 17990 first appears in π at position 151,556 of the decimal expansion (the 151,556ordinal-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
- Mayan numerals — Vigesimal dots-and-bars with a shell zero — one of the earliest true zeros.