561,440
561,440 is a composite number, even.
561,440 (five hundred sixty-one thousand four hundred forty) is an even 6-digit number. It is a composite number with 72 divisors, and factors as 2⁵ × 5 × 11² × 29. Its proper divisors sum to 946,780, more than the number itself, making it an abundant number. Written other ways, in hexadecimal, 0x89120.
Interestingness
Properties
- Parity
- Even
- Digit count
- 6
- Digit sum
- 20
- Digit product
- 0
- Digital root
- 2
- Palindrome
- No
- Bit width
- 20 bits
- Reversed
- 44,165
- Square (n²)
- 315,214,873,600
- Cube (n³)
- 176,974,238,633,984,000
- Divisor count
- 72
- σ(n) — sum of divisors
- 1,508,220
- φ(n) — Euler's totient
- 197,120
- Sum of prime factors
- 66
Primality
Prime factorization: 2 5 × 5 × 11 2 × 29
Divisors & multiples
Sums & aliquot sequence
Continued fraction of √n
√561,440 = [749; (3, 2, 2, 2, 1, 2, 5, 1, 9, 12, 3, 1, 1, 8, 3, 2, 1, 3, 2, 4, 1, 2, 1, 11, …)]
Period length 60 — the block in parentheses repeats forever.
Representations
- In words
- five hundred sixty-one thousand four hundred forty
- Ordinal
- 561440th
- Binary
- 10001001000100100000
- Octal
- 2110440
- Hexadecimal
- 0x89120
- Base64
- CJEg
- One's complement
- 4,294,405,855 (32-bit)
- Scientific notation
- 5.6144 × 10⁵
- As a duration
- 561,440 s = 6 days, 11 hours, 57 minutes, 20 seconds
As an angle
Historical numeral systems
- Babylonian (base 60)
- 𒁹𒁹 𒌋𒌋𒌋𒁹𒁹𒁹𒁹𒁹 𒌋𒌋𒌋𒌋𒌋𒁹𒁹𒁹𒁹𒁹𒁹𒁹 𒌋𒌋
- Egyptian hieroglyphic
- 𓆐𓆐𓆐𓆐𓆐𓂍𓂍𓂍𓂍𓂍𓂍𓆼𓍢𓍢𓍢𓍢𓎆𓎆𓎆𓎆
- Greek (Milesian)
- ͵φξαυμʹ
- Chinese
- 五十六萬一千四百四十
- Chinese (financial)
- 伍拾陸萬壹仟肆佰肆拾
Also seen as
Goldbach's conjecture says every even integer greater than 2 is the sum of two primes. For 561440, here are decompositions:
- 31 + 561409 = 561440
- 67 + 561373 = 561440
- 73 + 561367 = 561440
- 97 + 561343 = 561440
- 127 + 561313 = 561440
- 163 + 561277 = 561440
- 211 + 561229 = 561440
- 241 + 561199 = 561440
Showing the first eight; more decompositions exist.
As an unsigned 32-bit integer, this is the IPv4 address 0.8.145.32.
- Address
- 0.8.145.32
- Class
- reserved
- IPv4-mapped IPv6
- ::ffff:0.8.145.32
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 561,440 and was likely granted around 1895.
Patent numbers below 100,000 are excluded as too ambiguous; modern numbering currently reaches roughly 12.5 million.
Related reading
- Babylonian numerals — The base-60 cuneiform system that gave us 60 minutes, 60 seconds, and 360°.