155,890
155,890 is a composite number, even.
155,890 (one hundred fifty-five thousand eight hundred ninety) is an even 6-digit number. It is a composite number with 32 divisors, and factors as 2 × 5 × 7 × 17 × 131. Its proper divisors sum to 186,254, more than the number itself, making it an abundant number. Written other ways, in hexadecimal, 0x260F2.
Interestingness
Properties
- Parity
- Even
- Digit count
- 6
- Digit sum
- 28
- Digit product
- 0
- Digital root
- 1
- Palindrome
- No
- Bit width
- 18 bits
- Reversed
- 98,551
- Recamán's sequence
- a(206,084) = 155,890
- Square (n²)
- 24,301,692,100
- Cube (n³)
- 3,788,390,781,469,000
- Divisor count
- 32
- σ(n) — sum of divisors
- 342,144
- φ(n) — Euler's totient
- 49,920
- Sum of prime factors
- 162
Primality
Prime factorization: 2 × 5 × 7 × 17 × 131
Divisors & multiples
Sums & aliquot sequence
Continued fraction of √n
√155,890 = [394; (1, 4, 1, 5, 1, 2, 3, 1, 11, 5, 6, 1, 11, 9, 1, 1, 1, 51, 1, 86, 1, 3, 6, 1, …)]
Period length 54 — the block in parentheses repeats forever.
Representations
- In words
- one hundred fifty-five thousand eight hundred ninety
- Ordinal
- 155890th
- Binary
- 100110000011110010
- Octal
- 460362
- Hexadecimal
- 0x260F2
- Base64
- AmDy
- One's complement
- 4,294,811,405 (32-bit)
- Scientific notation
- 1.5589 × 10⁵
- As a duration
- 155,890 s = 1 day, 19 hours, 18 minutes, 10 seconds
As an angle
Historical numeral systems
- Babylonian (base 60)
- 𒌋𒌋𒌋𒌋𒁹𒁹𒁹 𒌋𒁹𒁹𒁹𒁹𒁹𒁹𒁹𒁹 𒌋
- Egyptian hieroglyphic
- 𓆐𓂍𓂍𓂍𓂍𓂍𓆼𓆼𓆼𓆼𓆼𓍢𓍢𓍢𓍢𓍢𓍢𓍢𓍢𓎆𓎆𓎆𓎆𓎆𓎆𓎆𓎆𓎆
- Greek (Milesian)
- ͵ρνεωϟʹ
- Mayan (base 20)
- 𝋳·𝋩·𝋮·𝋪
- Chinese
- 一十五萬五千八百九十
- Chinese (financial)
- 壹拾伍萬伍仟捌佰玖拾
Also seen as
Goldbach's conjecture says every even integer greater than 2 is the sum of two primes. For 155890, here are decompositions:
- 3 + 155887 = 155890
- 29 + 155861 = 155890
- 41 + 155849 = 155890
- 89 + 155801 = 155890
- 107 + 155783 = 155890
- 113 + 155777 = 155890
- 149 + 155741 = 155890
- 167 + 155723 = 155890
Showing the first eight; more decompositions exist.
UTF-8 encoding: F0 A6 83 B2 (4 bytes).
As an unsigned 32-bit integer, this is the IPv4 address 0.2.96.242.
- Address
- 0.2.96.242
- Class
- reserved
- IPv4-mapped IPv6
- ::ffff:0.2.96.242
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 155,890 and was likely granted around 1873.
Patent numbers below 100,000 are excluded as too ambiguous; modern numbering currently reaches roughly 12.5 million.
Related reading
- Egyptian hieroglyphic numerals — Seven hieroglyphs for every power of ten, from a single stroke to a million.