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68808 = 2334761
BaseRepresentation
bin10000110011001000
310111101110
4100303020
54200213
61250320
7404415
oct206310
9114343
1068808
1147773
12339a0
132541c
141b10c
15155c3
hex10cc8

68808 has 32 divisors (see below), whose sum is σ = 178560. Its totient is φ = 22080.

The previous prime is 68791. The next prime is 68813. The reversal of 68808 is 80886.

It is a congruent number.

It is an unprimeable number.

68808 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1098 + ... + 1158.

It is an arithmetic number, because the mean of its divisors is an integer number (5580).

268808 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 68808, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (89280).

68808 is an abundant number, since it is smaller than the sum of its proper divisors (109752).

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

68808 is a wasteful number, since it uses less digits than its factorization.

68808 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 117 (or 113 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 30.

The square root of 68808 is about 262.3127903858. The cubic root of 68808 is about 40.9775804456.

The spelling of 68808 in words is "sixty-eight thousand, eight hundred eight".

Divisors: 1 2 3 4 6 8 12 24 47 61 94 122 141 183 188 244 282 366 376 488 564 732 1128 1464 2867 5734 8601 11468 17202 22936 34404 68808