68378390 has 16 divisors (see below), whose sum is σ = 123703200. Its totient is φ = 27213120.

The previous prime is 68378389. The next prime is 68378393. The reversal of 68378390 is 9387386.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68378393) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15191 + ... + 19170.

It is an arithmetic number, because the mean of its divisors is an integer number (7731450).

Almost surely, 2^68378390 is an apocalyptic number.

68378390 is a deficient number, since it is larger than the sum of its proper divisors (55324810).

68378390 is a wasteful number, since it uses less digits than its factorization.

68378390 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34567.

The product of its (nonzero) digits is 217728, while the sum is 44.

The square root of 68378390 is about 8269.1226862346. The cubic root of 68378390 is about 408.9211972290.

The spelling of 68378390 in words is "sixty-eight million, three hundred seventy-eight thousand, three hundred ninety".