138455280

Names of 138455280

• Cardinal: 138455280 can be written as One hundred thirty-eight million, four hundred fifty-five thousand, two hundred eighty.

Scientific notation

• Scientific notation: 1.3845528 × 10⁸

Factors of 138455280

• Number of distinct prime factors ω(n): 6
• Total number of prime factors Ω(n): 10
• Sum of prime factors: 407

Divisors of 138455280

• Number of divisors d(n): 240
• Complete list of divisors:
  1 2 3 4 5 6 8 9 10 12 15 16 18 19 20 24 29 30 36 38 40 45 48 57 58 60 72 76 80 87 90 95 114 116 120 144 145 152 171 174 180 190 228 232 240 261 285 290 304 342 348 349 360 380 435 456 464 522 551 570 580 684 696 698 720 760 855 870 912 1044 1047 1102 1140 1160 1305 1368 1392 1396 1520 1653 1710 1740 1745 2088 2094 2204 2280 2320 2610 2736 2755 2792 3141 3306 3420 3480 3490 4176 4188 4408 4560 4959 5220 5235 5510 5584 6282 6612 6631 6840 6960 6980 8265 8376 8816 9918 10121 10440 10470 11020 12564 13224 13262 13680 13960 15705 16530 16752 19836 19893 20242 20880 20940 22040 24795 25128 26448 26524 27920 30363 31410 33060 33155 39672 39786 40484 41880 44080 49590 50256 50605 53048 59679 60726 62820 66120 66310 79344 79572 80968 83760 91089 99180 99465 101210 106096 119358 121452 125640 132240 132620 151815 159144 161936 182178 192299 198360 198930 202420 238716 242904 251280 265240 298395 303630 318288 364356 384598 396720 397860 404840 455445 477432 485808 530480 576897 596790 607260 728712 769196 795720 809680 910890 954864 961495 1153794 1193580 1214520 1457424 1538392 1591440 1730691 1821780 1922990 2307588 2387160 2429040 2884485 3076784 3461382 3643560 3845980 4615176 4774320 5768970 6922764 7287120 7691960 8653455 9230352 11537940 13845528 15383920 17306910 23075880 27691056 34613820 46151760 69227640 138455280
• Sum of all divisors σ(n): 507780000
• Sum of proper divisors (its aliquot sum) s(n): 369324720
• 138455280 is an abundant number, because the sum of its proper divisors (369324720) is greater than itself. Its abundance is 230869440

Bases of 138455280

• Binary: 1000010000001010100011110000₂
• Hexadecimal: 0x840A8F0
• Base-36: 2AFKS0

Squares and roots of 138455280

• 138455280 squared (138455280²) is 19169864559878400
• 138455280 cubed (138455280³) is 2654168965200040637952000
• The square root of 138455280 is 11766.7021718067
• The cube root of 138455280 is 517.3325930541

Scales and comparisons

• 138,455,280 seconds is equal to 4 years, 20 weeks, 6 days, 11 hours, 48 minutes.
• To count from 1 to 138,455,280 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 138455280 cubic inches would be around 43.1 feet tall.

Recreational maths with 138455280

• 138455280 backwards is 082554831
• 138455280 is a Harshad number.
• The number of decimal digits it has is: 9
• The sum of 138455280's digits is 36
• More coming soon!