21439404

Names of 21439404

• Cardinal: 21439404 can be written as Twenty-one million, four hundred thirty-nine thousand, four hundred four.

Scientific notation

• Scientific notation: 2.1439404 × 10⁷

Factors of 21439404

• Number of distinct prime factors ω(n): 5
• Total number of prime factors Ω(n): 10
• Sum of prime factors: 172

Divisors of 21439404

• Number of divisors d(n): 144
• Complete list of divisors:
  1 2 3 4 6 7 9 12 14 18 21 23 27 28 36 42 46 54 63 69 81 84 92 108 126 137 138 161 162 189 207 243 252 274 276 322 324 378 411 414 483 486 548 567 621 644 756 822 828 959 966 972 1134 1233 1242 1449 1644 1701 1863 1918 1932 2268 2466 2484 2877 2898 3151 3402 3699 3726 3836 4347 4932 5589 5754 5796 6302 6804 7398 7452 8631 8694 9453 11097 11178 11508 12604 13041 14796 17262 17388 18906 22057 22194 22356 25893 26082 28359 33291 34524 37812 39123 44114 44388 51786 52164 56718 66171 66582 77679 78246 85077 88228 103572 113436 132342 133164 155358 156492 170154 198513 233037 255231 264684 310716 340308 397026 466074 510462 595539 765693 794052 932148 1020924 1191078 1531386 1786617 2382156 3062772 3573234 5359851 7146468 10719702 21439404
• Sum of all divisors σ(n): 67511808
• Sum of proper divisors (its aliquot sum) s(n): 46072404
• 21439404 is an abundant number, because the sum of its proper divisors (46072404) is greater than itself. Its abundance is 24633000

Bases of 21439404

• Binary: 1010001110010001110101100₂
• Hexadecimal: 0x14723AC
• Base-36: CRIR0

Squares and roots of 21439404

• 21439404 squared (21439404²) is 459648043875216
• 21439404 cubed (21439404³) is 9854580110450481411264
• The square root of 21439404 is 4630.2704024711
• The cube root of 21439404 is 277.8034081003

Scales and comparisons

• 21,439,404 seconds is equal to 35 weeks, 3 days, 3 hours, 23 minutes, 24 seconds.
• To count from 1 to 21,439,404 would take you about five 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 21439404 cubic inches would be around 23.2 feet tall.

Recreational maths with 21439404

• 21439404 backwards is 40493412
• 21439404 is a Harshad number.
• The number of decimal digits it has is: 8
• The sum of 21439404's digits is 27
• More coming soon!