129928400

Names of 129928400

• Cardinal: 129928400 can be written as One hundred twenty-nine million, nine hundred twenty-eight thousand, four hundred.

Scientific notation

• Scientific notation: 1.299284 × 10⁸

Factors of 129928400

• Number of distinct prime factors ω(n): 4
• Total number of prime factors Ω(n): 10
• Sum of prime factors: 961

Divisors of 129928400

• Number of divisors d(n): 120
• Complete list of divisors:
  1 2 4 5 7 8 10 14 16 20 25 28 35 40 49 50 56 70 80 98 100 112 140 175 196 200 245 280 343 350 392 400 490 560 686 700 784 947 980 1225 1372 1400 1715 1894 1960 2450 2744 2800 3430 3788 3920 4735 4900 5488 6629 6860 7576 8575 9470 9800 13258 13720 15152 17150 18940 19600 23675 26516 27440 33145 34300 37880 46403 47350 53032 66290 68600 75760 92806 94700 106064 132580 137200 165725 185612 189400 232015 265160 324821 331450 371224 378800 464030 530320 649642 662900 742448 928060 1160075 1299284 1325800 1624105 1856120 2320150 2598568 2651600 3248210 3712240 4640300 5197136 6496420 8120525 9280600 12992840 16241050 18561200 25985680 32482100 64964200 129928400
• Sum of all divisors σ(n): 364411200
• Sum of proper divisors (its aliquot sum) s(n): 234482800
• 129928400 is an abundant number, because the sum of its proper divisors (234482800) is greater than itself. Its abundance is 104554400

Bases of 129928400

• Binary: 111101111101000110011010000₂
• Hexadecimal: 0x7BE8CD0
• Base-36: 25CTE8

Squares and roots of 129928400

• 129928400 squared (129928400²) is 16881389126560000
• 129928400 cubed (129928400³) is 2193371878991338304000000
• The square root of 129928400 is 11398.6139508275
• The cube root of 129928400 is 506.4866819929

Scales and comparisons

• 129,928,400 seconds is equal to 4 years, 6 weeks, 5 days, 19 hours, 13 minutes, 20 seconds.
• To count from 1 to 129,928,400 would take you about six years!

  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 129928400 cubic inches would be around 42.2 feet tall.

Recreational maths with 129928400

• 129928400 backwards is 004829921
• 129928400 is a Harshad number.
• The number of decimal digits it has is: 9
• The sum of 129928400's digits is 35
• More coming soon!