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68486320 = 2457217471
BaseRepresentation
bin1000001010100…
…00010010110000
311202212110120101
410011100102300
5120013030240
610443522144
71461060400
oct405202260
9152773511
1068486320
1135727871
121ab29354
131125b866
14914a800
15602c39a
hex41504b0

68486320 has 60 divisors (see below), whose sum is σ = 185238144. Its totient is φ = 23479680.

The previous prime is 68486309. The next prime is 68486321. The reversal of 68486320 is 2368486.

It is a self number, because there is not a number n which added to its sum of digits gives 68486320.

It is not an unprimeable number, because it can be changed into a prime (68486321) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4816 + ... + 12655.

Almost surely, 268486320 is an apocalyptic number.

It is an amenable number.

68486320 is an abundant number, since it is smaller than the sum of its proper divisors (116751824).

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

68486320 is a wasteful number, since it uses less digits than its factorization.

68486320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17498 (or 17485 counting only the distinct ones).

The product of its (nonzero) digits is 55296, while the sum is 37.

The square root of 68486320 is about 8275.6461983340. The cubic root of 68486320 is about 409.1362342896.

The spelling of 68486320 in words is "sixty-eight million, four hundred eighty-six thousand, three hundred twenty".

Divisors: 1 2 4 5 7 8 10 14 16 20 28 35 40 49 56 70 80 98 112 140 196 245 280 392 490 560 784 980 1960 3920 17471 34942 69884 87355 122297 139768 174710 244594 279536 349420 489188 611485 698840 856079 978376 1222970 1397680 1712158 1956752 2445940 3424316 4280395 4891880 6848632 8560790 9783760 13697264 17121580 34243160 68486320