30420

Names of 30420

• Cardinal: 30420 can be written as Thirty thousand, four hundred twenty.

Scientific notation

• Scientific notation: 3.042 × 10⁴

Factors of 30420

• Number of distinct prime factors ω(n): 4
• Total number of prime factors Ω(n): 7
• Sum of prime factors: 23

Divisors of 30420

• Number of divisors d(n): 54
• Complete list of divisors:
  1 2 3 4 5 6 9 10 12 13 15 18 20 26 30 36 39 45 52 60 65 78 90 117 130 156 169 180 195 234 260 338 390 468 507 585 676 780 845 1014 1170 1521 1690 2028 2340 2535 3042 3380 5070 6084 7605 10140 15210 30420
• Sum of all divisors σ(n): 99918
• Sum of proper divisors (its aliquot sum) s(n): 69498
• 30420 is an abundant number, because the sum of its proper divisors (69498) is greater than itself. Its abundance is 39078

Bases of 30420

• Binary: 111011011010100₂
• Hexadecimal: 0x76D4
• Base-36: NH0

Squares and roots of 30420

• 30420 squared (30420²) is 925376400
• 30420 cubed (30420³) is 28149950088000
• The square root of 30420 is 174.4133022449
• The cube root of 30420 is 31.2166577715

Scales and comparisons

• 30,420 seconds is equal to 8 hours, 27 minutes.
• To count from 1 to 30,420 would take you about eight hours.

  This is a very rough estimate, based on a speaking rate of half a second every third order of magnitude. If you speak quickly, you could probably say any randomly-chosen number between one and a thousand in around half a second. Very big numbers obviously take longer to say, so we add half a second for every extra x1000. (We do not count involuntary pauses, bathroom breaks or the necessity of sleep in our calculation!)

• A cube with a volume of 30420 cubic inches would be around 2.6 feet tall.

Recreational maths with 30420

• 30420 backwards is 02403
• 30420 is a Harshad number.
• The number of decimal digits it has is: 5
• The sum of 30420's digits is 9
• More coming soon!