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30803409080 = 23517298917551
BaseRepresentation
bin11100101100000001…
…101011100010111000
32221111202001022102222
4130230001223202320
51001041133042310
622052331543212
72140223441243
oct345401534270
987452038388
1030803409080
11120777a3184
125b77bbab08
132b9b96c8a2
1416c302025a
15c04426055
hex72c06b8b8

30803409080 has 128 divisors (see below), whose sum is σ = 76772448000. Its totient is φ = 11070259200.

The previous prime is 30803409079. The next prime is 30803409103. The reversal of 30803409080 is 8090430803.

It is a Cunningham number, because it is equal to 1755092-1.

It is a self number, because there is not a number n which added to its sum of digits gives 30803409080.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1746305 + ... + 1763855.

It is an arithmetic number, because the mean of its divisors is an integer number (599784750).

Almost surely, 230803409080 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 30803409080, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (38386224000).

30803409080 is an abundant number, since it is smaller than the sum of its proper divisors (45969038920).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

30803409080 is a wasteful number, since it uses less digits than its factorization.

30803409080 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17697 (or 17693 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 35.

Adding to 30803409080 its reverse (8090430803), we get a palindrome (38893839883).

The spelling of 30803409080 in words is "thirty billion, eight hundred three million, four hundred nine thousand, eighty".

Divisors: 1 2 4 5 8 10 17 20 29 34 40 58 68 85 89 116 136 145 170 178 232 290 340 356 445 493 580 680 712 890 986 1160 1513 1780 1972 2465 2581 3026 3560 3944 4930 5162 6052 7565 9860 10324 12104 12905 15130 17551 19720 20648 25810 30260 35102 43877 51620 60520 70204 87754 87755 103240 140408 175508 175510 219385 298367 351016 351020 438770 508979 596734 702040 877540 1017958 1193468 1491835 1562039 1755080 2035916 2386936 2544895 2983670 3124078 4071832 5089790 5967340 6248156 7810195 8652643 10179580 11934680 12496312 15620390 17305286 20359160 26554663 31240780 34610572 43263215 45299131 53109326 62481560 69221144 86526430 90598262 106218652 132773315 173052860 181196524 212437304 226495655 265546630 346105720 362393048 452991310 531093260 770085227 905982620 1062186520 1540170454 1811965240 3080340908 3850426135 6160681816 7700852270 15401704540 30803409080