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68181048 = 23331324281
BaseRepresentation
bin1000001000001…
…01110000111000
311202021221211000
410010011300320
5114423243143
610433205000
71455346365
oct404056070
9152257730
1068181048
1135539481
121aa00760
1311182920
1490ab46c
155ebbbd3
hex4105c38

68181048 has 64 divisors (see below), whose sum is σ = 203968800. Its totient is φ = 20977920.

The previous prime is 68181019. The next prime is 68181053. The reversal of 68181048 is 84018186.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9333 + ... + 14948.

Almost surely, 268181048 is an apocalyptic number.

It is an amenable number.

68181048 is an abundant number, since it is smaller than the sum of its proper divisors (135787752).

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

68181048 is a wasteful number, since it uses less digits than its factorization.

68181048 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24309 (or 24299 counting only the distinct ones).

The product of its (nonzero) digits is 12288, while the sum is 36.

The square root of 68181048 is about 8257.1816014909. The cubic root of 68181048 is about 408.5274320681.

The spelling of 68181048 in words is "sixty-eight million, one hundred eighty-one thousand, forty-eight".

Divisors: 1 2 3 4 6 8 9 12 13 18 24 26 27 36 39 52 54 72 78 104 108 117 156 216 234 312 351 468 702 936 1404 2808 24281 48562 72843 97124 145686 194248 218529 291372 315653 437058 582744 631306 655587 874116 946959 1262612 1311174 1748232 1893918 2525224 2622348 2840877 3787836 5244696 5681754 7575672 8522631 11363508 17045262 22727016 34090524 68181048