68320768 has 20 divisors (see below), whose sum is σ = 136509120. Its totient is φ = 34160128.

The previous prime is 68320757. The next prime is 68320783. The reversal of 68320768 is 86702386.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 68320768.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 66208 + ... + 67231.

It is an arithmetic number, because the mean of its divisors is an integer number (6825456).

Almost surely, 2^68320768 is an apocalyptic number.

It is an amenable number.

68320768 is a deficient number, since it is larger than the sum of its proper divisors (68188352).

68320768 is an equidigital number, since it uses as much as digits as its factorization.

68320768 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 133457 (or 133441 counting only the distinct ones).

The product of its (nonzero) digits is 96768, while the sum is 40.

The square root of 68320768 is about 8265.6377854343. The cubic root of 68320768 is about 408.8062999196.

The spelling of 68320768 in words is "sixty-eight million, three hundred twenty thousand, seven hundred sixty-eight".