68390 has 16 divisors (see below), whose sum is σ = 140832. Its totient is φ = 23424.

The previous prime is 68389. The next prime is 68399. The reversal of 68390 is 9386.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68399) 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 7 ways as a sum of consecutive naturals, for example, 419 + ... + 558.

It is an arithmetic number, because the mean of its divisors is an integer number (8802).

2⁶⁸³⁹⁰ is an apocalyptic number.

68390 is an abundant number, since it is smaller than the sum of its proper divisors (72442).

It is a weird number, because it is abundant, but not a pseudoperfect number.

It is a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (70416).

68390 is a wasteful number, since it uses less digits than its factorization.

68390 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 991.

The product of its (nonzero) digits is 1296, while the sum is 26.

The square root of 68390 is about 261.5148179358. The cubic root of 68390 is about 40.8944339562.

The spelling of 68390 in words is "sixty-eight thousand, three hundred ninety".