180,428
180,428 is a composite number, even.
180,428 (one hundred eighty thousand four hundred twenty-eight) is an even 6-digit number. It is a composite number with 12 divisors, and factors as 2² × 43 × 1,049. Written other ways, in hexadecimal, 0x2C0CC.
Interestingness
Properties
- Parity
- Even
- Digit count
- 6
- Digit sum
- 23
- Digit product
- 0
- Digital root
- 5
- Palindrome
- No
- Bit width
- 18 bits
- Reversed
- 824,081
- Recamán's sequence
- a(464,871) = 180,428
- Square (n²)
- 32,554,263,184
- Cube (n³)
- 5,873,700,597,762,752
- Divisor count
- 12
- σ(n) — sum of divisors
- 323,400
- φ(n) — Euler's totient
- 88,032
- Sum of prime factors
- 1,096
Primality
Prime factorization: 2 2 × 43 × 1049
Divisors & multiples
Sums & aliquot sequence
Continued fraction of √n
√180,428 = [424; (1, 3, 3, 5, 3, 1, 1, 4, 7, 1, 18, 1, 7, 4, 1, 1, 3, 5, 3, 3, 1, 848)]
Period length 22 — the block in parentheses repeats forever.
Representations
- In words
- one hundred eighty thousand four hundred twenty-eight
- Ordinal
- 180428th
- Binary
- 101100000011001100
- Octal
- 540314
- Hexadecimal
- 0x2C0CC
- Base64
- AsDM
- One's complement
- 4,294,786,867 (32-bit)
- Scientific notation
- 1.80428 × 10⁵
- As a duration
- 180,428 s = 2 days, 2 hours, 7 minutes, 8 seconds
As an angle
Historical numeral systems
- Babylonian (base 60)
- 𒌋𒌋𒌋𒌋𒌋 𒁹𒁹𒁹𒁹𒁹𒁹𒁹 𒁹𒁹𒁹𒁹𒁹𒁹𒁹𒁹
- Egyptian hieroglyphic
- 𓆐𓂍𓂍𓂍𓂍𓂍𓂍𓂍𓂍𓍢𓍢𓍢𓍢𓎆𓎆𓏺𓏺𓏺𓏺𓏺𓏺𓏺𓏺
- Greek (Milesian)
- ͵ρπυκηʹ
- Chinese
- 一十八萬零四百二十八
- Chinese (financial)
- 壹拾捌萬零肆佰貳拾捌
Also seen as
Goldbach's conjecture says every even integer greater than 2 is the sum of two primes. For 180428, here are decompositions:
- 37 + 180391 = 180428
- 67 + 180361 = 180428
- 97 + 180331 = 180428
- 139 + 180289 = 180428
- 181 + 180247 = 180428
- 331 + 180097 = 180428
- 421 + 180007 = 180428
- 439 + 179989 = 180428
Showing the first eight; more decompositions exist.
UTF-8 encoding: F0 AC 83 8C (4 bytes).
As an unsigned 32-bit integer, this is the IPv4 address 0.2.192.204.
- Address
- 0.2.192.204
- Class
- reserved
- IPv4-mapped IPv6
- ::ffff:0.2.192.204
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 180,428 and was likely granted around 1875.
Patent numbers below 100,000 are excluded as too ambiguous; modern numbering currently reaches roughly 12.5 million.
The digit sequence 180428 first appears in π at position 80,213 of the decimal expansion (the 80,213ordinal-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
- Babylonian numerals — The base-60 cuneiform system that gave us 60 minutes, 60 seconds, and 360°.