421540728

Names of 421540728

• Cardinal: 421540728 can be written as Four hundred twenty-one million, five hundred forty thousand, seven hundred twenty-eight.

Scientific notation

• Scientific notation: 4.21540728 × 10⁸

Factors of 421540728

• Number of distinct prime factors ω(n): 5
• Total number of prime factors Ω(n): 9
• Sum of prime factors: 416

Divisors of 421540728

• Number of divisors d(n): 144
• Complete list of divisors:
  1 2 3 4 6 7 8 12 14 21 24 28 31 42 49 56 62 84 93 98 124 147 168 186 196 217 248 294 372 373 392 434 588 651 744 746 868 961 1119 1176 1302 1492 1519 1736 1922 2238 2604 2611 2883 2984 3038 3844 4476 4557 5208 5222 5766 6076 6727 7688 7833 8952 9114 10444 11532 11563 12152 13454 15666 18228 18277 20181 20888 23064 23126 26908 31332 34689 36456 36554 40362 46252 47089 53816 54831 62664 69378 73108 80724 80941 92504 94178 109662 138756 141267 146216 161448 161882 188356 219324 242823 277512 282534 323764 358453 376712 438648 485646 565068 566587 647528 716906 971292 1075359 1130136 1133174 1433812 1699761 1942584 2150718 2266348 2509171 2867624 3399522 4301436 4532696 5018342 6799044 7527513 8602872 10036684 13598088 15055026 17564197 20073368 30110052 35128394 52692591 60220104 70256788 105385182 140513576 210770364 421540728
• Sum of all divisors σ(n): 1270126440
• Sum of proper divisors (its aliquot sum) s(n): 848585712
• 421540728 is an abundant number, because the sum of its proper divisors (848585712) is greater than itself. Its abundance is 427044984

Bases of 421540728

• Binary: 11001001000000011001101111000₂
• Hexadecimal: 0x19203378
• Base-36: 6YZ2WO

Squares and roots of 421540728

• 421540728 squared (421540728²) is 177696585362769984
• 421540728 cubed (421540728³) is 74906347956936203151908352
• The square root of 421540728 is 20531.4570354859
• The cube root of 421540728 is 749.8018605479

Scales and comparisons

• 421,540,728 seconds is equal to 13 years, 20 weeks, 6 days, 22 hours, 38 minutes, 48 seconds.
• To count from 1 to 421,540,728 would take you about twenty 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 421540728 cubic inches would be around 62.5 feet tall.

Recreational maths with 421540728

• 421540728 backwards is 827045124
• The number of decimal digits it has is: 9
• The sum of 421540728's digits is 33
• More coming soon!