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68128652 = 22791671291
BaseRepresentation
bin1000000111110…
…00111110001100
311202012021221102
410003320332030
5114420104102
610432122232
71455040544
oct403707614
9152167842
1068128652
1135503079
121a996378
1311164b17
149096324
155eab402
hex40f8f8c

68128652 has 24 divisors (see below), whose sum is σ = 121551360. Its totient is φ = 33405840.

The previous prime is 68128603. The next prime is 68128667. The reversal of 68128652 is 25682186.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 52127 + ... + 53417.

It is an arithmetic number, because the mean of its divisors is an integer number (5064640).

Almost surely, 268128652 is an apocalyptic number.

It is an amenable number.

68128652 is a deficient number, since it is larger than the sum of its proper divisors (53422708).

68128652 is a wasteful number, since it uses less digits than its factorization.

68128652 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1541 (or 1539 counting only the distinct ones).

The product of its digits is 46080, while the sum is 38.

The square root of 68128652 is about 8254.0082384257. The cubic root of 68128652 is about 408.4227564068.

The spelling of 68128652 in words is "sixty-eight million, one hundred twenty-eight thousand, six hundred fifty-two".

Divisors: 1 2 4 79 158 167 316 334 668 1291 2582 5164 13193 26386 52772 101989 203978 215597 407956 431194 862388 17032163 34064326 68128652