128,020
128,020 is a composite number, even.
128,020 (one hundred twenty-eight thousand twenty) is an even 6-digit number. It is a composite number with 24 divisors, and factors as 2² × 5 × 37 × 173. Its proper divisors sum to 149,684, more than the number itself, making it an abundant number. Written other ways, in hexadecimal, 0x1F414.
Interestingness
Properties
- Parity
- Even
- Digit count
- 6
- Digit sum
- 13
- Digit product
- 0
- Digital root
- 4
- Palindrome
- No
- Bit width
- 17 bits
- Reversed
- 20,821
- Square (n²)
- 16,389,120,400
- Cube (n³)
- 2,098,135,193,608,000
- Divisor count
- 24
- σ(n) — sum of divisors
- 277,704
- φ(n) — Euler's totient
- 49,536
- Sum of prime factors
- 219
Primality
Prime factorization: 2 2 × 5 × 37 × 173
Divisors & multiples
Sums & aliquot sequence
Continued fraction of √n
√128,020 = [357; (1, 3, 1, 33, 3, 1, 1, 1, 1, 1, 3, 1, 2, 1, 7, 1, 3, 1, 1, 1, 1, 2, 19, 2, …)]
Representations
- In words
- one hundred twenty-eight thousand twenty
- Ordinal
- 128020th
- Binary
- 11111010000010100
- Octal
- 372024
- Hexadecimal
- 0x1F414
- Base64
- AfQU
- One's complement
- 4,294,839,275 (32-bit)
- Scientific notation
- 1.2802 × 10⁵
- As a duration
- 128,020 s = 1 day, 11 hours, 33 minutes, 40 seconds
As an angle
Historical numeral systems
- Babylonian (base 60)
- 𒌋𒌋𒌋𒁹𒁹𒁹𒁹𒁹 𒌋𒌋𒌋𒁹𒁹𒁹 𒌋𒌋𒌋𒌋
- Egyptian hieroglyphic
- 𓆐𓂍𓂍𓆼𓆼𓆼𓆼𓆼𓆼𓆼𓆼𓎆𓎆
- Greek (Milesian)
- ͵ρκηκʹ
- Mayan (base 20)
- 𝋰·𝋠·𝋡·𝋠
- Chinese
- 一十二萬八千零二十
- Chinese (financial)
- 壹拾貳萬捌仟零貳拾
Also seen as
Goldbach's conjecture says every even integer greater than 2 is the sum of two primes. For 128020, here are decompositions:
- 23 + 127997 = 128020
- 41 + 127979 = 128020
- 47 + 127973 = 128020
- 89 + 127931 = 128020
- 107 + 127913 = 128020
- 239 + 127781 = 128020
- 257 + 127763 = 128020
- 281 + 127739 = 128020
Showing the first eight; more decompositions exist.
UTF-8 encoding: F0 9F 90 94 (4 bytes).
As an unsigned 32-bit integer, this is the IPv4 address 0.1.244.20.
- Address
- 0.1.244.20
- Class
- reserved
- IPv4-mapped IPv6
- ::ffff:0.1.244.20
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 128,020 and was likely granted around 1872.
Patent numbers below 100,000 are excluded as too ambiguous; modern numbering currently reaches roughly 12.5 million.
The digit sequence 128020 first appears in π at position 701,788 of the decimal expansion (the 701,788ordinal-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
- Egyptian hieroglyphic numerals — Seven hieroglyphs for every power of ten, from a single stroke to a million.