1221290928

Names of 1221290928

• Cardinal: 1221290928 can be written as One billion, two hundred twenty-one million, two hundred ninety thousand, nine hundred twenty-eight.

Scientific notation

• Scientific notation: 1.221290928 × 10⁹

Factors of 1221290928

• Number of distinct prime factors ω(n): 6
• Total number of prime factors Ω(n): 10
• Sum of prime factors: 623

Divisors of 1221290928

• Number of divisors d(n): 240
• Complete list of divisors:
  1 2 3 4 6 8 9 11 12 13 16 18 22 24 26 33 36 39 44 48 52 66 72 78 88 99 104 117 127 132 143 144 156 176 198 208 234 254 264 286 312 381 396 429 467 468 508 528 572 624 762 792 858 934 936 1016 1143 1144 1287 1397 1401 1524 1584 1651 1716 1868 1872 2032 2286 2288 2574 2794 2802 3048 3302 3432 3736 4191 4203 4572 4953 5137 5148 5588 5604 6071 6096 6604 6864 7472 8382 8406 9144 9906 10274 10296 11176 11208 12142 12573 13208 14859 15411 16764 16812 18161 18213 18288 19812 20548 20592 22352 22416 24284 25146 26416 29718 30822 33528 33624 36322 36426 39624 41096 46233 48568 50292 54483 54639 59309 59436 61644 66781 67056 67248 72644 72852 79248 82192 92466 97136 100584 108966 109278 118618 118872 123288 133562 145288 145704 163449 177927 184932 200343 201168 217932 218556 237236 237744 246576 267124 290576 291408 326898 355854 369864 400686 435864 437112 474472 533781 534248 601029 652399 653796 711708 739728 771017 801372 871728 874224 948944 1067562 1068496 1202058 1304798 1307592 1423416 1542034 1602744 1957197 2135124 2313051 2404116 2609596 2615184 2846832 3084068 3205488 3914394 4270248 4626102 4808232 5219192 5871591 6168136 6939153 7828788 8481187 8540496 9252204 9616464 10438384 11743182 12336272 13878306 15657576 16962374 18504408 23486364 25443561 27756612 31315152 33924748 37008816 46972728 50887122 55513224 67849496 76330683 93945456 101774244 111026448 135698992 152661366 203548488 305322732 407096976 610645464 1221290928
• Sum of all divisors σ(n): 4055740416
• Sum of proper divisors (its aliquot sum) s(n): 2834449488
• 1221290928 is an abundant number, because the sum of its proper divisors (2834449488) is greater than itself. Its abundance is 1613158560

Bases of 1221290928

• Binary: 1001000110010110110101110110000₂
• Hexadecimal: 0x48CB6BB0
• Base-36: K74I40

Squares and roots of 1221290928

• 1221290928 squared (1221290928²) is 1491551530815101184
• 1221290928 cubed (1221290928³) is 1821618353228995521421258752
• The square root of 1221290928 is 34946.9730878085
• The cube root of 1221290928 is 1068.9064811607

Scales and comparisons

• 1,221,290,928 seconds is equal to 38 years, 43 weeks, 2 days, 7 hours, 28 minutes, 48 seconds.
• To count from 1 to 1,221,290,928 would take you about seventy-seven 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 1221290928 cubic inches would be around 89.1 feet tall.

Recreational maths with 1221290928

• 1221290928 backwards is 8290921221
• 1221290928 is a Harshad number.
• The number of decimal digits it has is: 10
• The sum of 1221290928's digits is 36
• More coming soon!