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68131360 = 2551138711
BaseRepresentation
bin1000000111110…
…01101000100000
311202012102122201
410003321220200
5114420200420
610432142544
71455051463
oct403715040
9152172581
1068131360
1135505110
121a997a54
131116611b
1490972da
155eac10a
hex40f9a20

68131360 has 48 divisors (see below), whose sum is σ = 175597632. Its totient is φ = 24774400.

The previous prime is 68131339. The next prime is 68131361. The reversal of 68131360 is 6313186.

It is not an unprimeable number, because it can be changed into a prime (68131361) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17596 + ... + 21115.

It is an arithmetic number, because the mean of its divisors is an integer number (3658284).

Almost surely, 268131360 is an apocalyptic number.

It is an amenable number.

68131360 is an abundant number, since it is smaller than the sum of its proper divisors (107466272).

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

68131360 is a wasteful number, since it uses less digits than its factorization.

68131360 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38737 (or 38729 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 28.

The square root of 68131360 is about 8254.1722783087. The cubic root of 68131360 is about 408.4281677090.

It can be divided in two parts, 681 and 31360, that added together give a square (32041 = 1792).

The spelling of 68131360 in words is "sixty-eight million, one hundred thirty-one thousand, three hundred sixty".

Divisors: 1 2 4 5 8 10 11 16 20 22 32 40 44 55 80 88 110 160 176 220 352 440 880 1760 38711 77422 154844 193555 309688 387110 425821 619376 774220 851642 1238752 1548440 1703284 2129105 3096880 3406568 4258210 6193760 6813136 8516420 13626272 17032840 34065680 68131360