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68538 = 2311423
BaseRepresentation
bin10000101110111010
310111000110
4100232322
54143123
61245150
7403551
oct205672
9114013
1068538
1147548
12337b6
1325272
141ad98
1515493
hex10bba

68538 has 8 divisors (see below), whose sum is σ = 137088. Its totient is φ = 22844.

The previous prime is 68531. The next prime is 68539. The reversal of 68538 is 83586.

It can be divided in two parts, 68 and 538, that added together give a palindrome (606).

It is a sphenic number, since it is the product of 3 distinct primes.

68538 is an admirable number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (68531) by changing a digit.

68538 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 3 ways as a sum of consecutive naturals, for example, 5706 + ... + 5717.

It is an arithmetic number, because the mean of its divisors is an integer number (17136).

268538 is an apocalyptic number.

68538 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

It is a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (68544).

68538 is a wasteful number, since it uses less digits than its factorization.

68538 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11428.

The product of its digits is 5760, while the sum is 30.

The square root of 68538 is about 261.7976317693. The cubic root of 68538 is about 40.9239120259.

The spelling of 68538 in words is "sixty-eight thousand, five hundred thirty-eight".

Divisors: 1 2 3 6 11423 22846 34269 68538