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BaseRepresentation
bin10000101110011100
310110222100
4100232130
54143013
61245100
7403506
oct205634
9113870
1068508
1147520
1233790
132524b
1515473
hex10b9c

68508 has 36 divisors (see below), whose sum is σ = 190008. Its totient is φ = 20640.

The previous prime is 68507. The next prime is 68521. The reversal of 68508 is 80586.

It is a tau number, because it is divible by the number of its divisors (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68501) 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, 310 + ... + 482.

It is an arithmetic number, because the mean of its divisors is an integer number (5278).

268508 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 68508, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (95004).

68508 is an abundant number, since it is smaller than the sum of its proper divisors (121500).

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

68508 is a wasteful number, since it uses less digits than its factorization.

68508 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 194 (or 189 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 27.

The square root of 68508 is about 261.7403293342. The cubic root of 68508 is about 40.9179401732.

It can be divided in two parts, 68 and 508, that added together give a square (576 = 242).

The spelling of 68508 in words is "sixty-eight thousand, five hundred eight".