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68132160 = 2632541577
BaseRepresentation
bin1000000111110…
…01110101000000
311202012110202100
410003321311000
5114420212120
610432150400
71455054015
oct403716500
9152173670
1068132160
1135505778
121a998400
13111665b5
14909770c
155eac490
hex40f9d40

68132160 has 168 divisors, whose sum is σ = 240478056. Its totient is φ = 17694720.

The previous prime is 68132153. The next prime is 68132179. The reversal of 68132160 is 6123186.

It can be written as a sum of positive squares in 4 ways, for example, as 9884736 + 58247424 = 3144^2 + 7632^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 117792 + ... + 118368.

It is an arithmetic number, because the mean of its divisors is an integer number (1431417).

Almost surely, 268132160 is an apocalyptic number.

68132160 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 68132160, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (120239028).

68132160 is an abundant number, since it is smaller than the sum of its proper divisors (172345896).

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

68132160 is a wasteful number, since it uses less digits than its factorization.

68132160 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 641 (or 628 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 27.

The square root of 68132160 is about 8254.2207385071. The cubic root of 68132160 is about 408.4297662937.

The spelling of 68132160 in words is "sixty-eight million, one hundred thirty-two thousand, one hundred sixty".