68021384 has 16 divisors (see below), whose sum is σ = 128184000. Its totient is φ = 33838992.

The previous prime is 68021383. The next prime is 68021407. The reversal of 68021384 is 48312086.

It is a self number, because there is not a number n which added to its sum of digits gives 68021384.

It is not an unprimeable number, because it can be changed into a prime (68021381) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19772 + ... + 22955.

It is an arithmetic number, because the mean of its divisors is an integer number (8011500).

Almost surely, 2^68021384 is an apocalyptic number.

It is an amenable number.

68021384 is a deficient number, since it is larger than the sum of its proper divisors (60162616).

68021384 is a wasteful number, since it uses less digits than its factorization.

68021384 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42932 (or 42928 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 32.

The square root of 68021384 is about 8247.5077447675. The cubic root of 68021384 is about 408.2082910570.

The spelling of 68021384 in words is "sixty-eight million, twenty-one thousand, three hundred eighty-four".