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68182180 = 22511417559
BaseRepresentation
bin1000001000001…
…10000010100100
311202022000100221
410010012002210
5114423312210
610433214124
71455352603
oct404060244
9152260327
1068182180
113553a310
121aa01344
13111832b1
1490aba3a
155ebc1da
hex41060a4

68182180 has 48 divisors (see below), whose sum is σ = 160030080. Its totient is φ = 24185600.

The previous prime is 68182129. The next prime is 68182187. The reversal of 68182180 is 8128186.

It is not an unprimeable number, because it can be changed into a prime (68182187) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5241 + ... + 12799.

It is an arithmetic number, because the mean of its divisors is an integer number (3333960).

Almost surely, 268182180 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 68182180, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (80015040).

68182180 is an abundant number, since it is smaller than the sum of its proper divisors (91847900).

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

68182180 is a wasteful number, since it uses less digits than its factorization.

68182180 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7620 (or 7618 counting only the distinct ones).

The product of its (nonzero) digits is 6144, while the sum is 34.

The square root of 68182180 is about 8257.2501475976. The cubic root of 68182180 is about 408.5296929627.

It can be divided in two parts, 6818 and 2180, that added together give a palindrome (8998).

The spelling of 68182180 in words is "sixty-eight million, one hundred eighty-two thousand, one hundred eighty".

Divisors: 1 2 4 5 10 11 20 22 41 44 55 82 110 164 205 220 410 451 820 902 1804 2255 4510 7559 9020 15118 30236 37795 75590 83149 151180 166298 309919 332596 415745 619838 831490 1239676 1549595 1662980 3099190 3409109 6198380 6818218 13636436 17045545 34091090 68182180