68021872 has 20 divisors (see below), whose sum is σ = 134858680. Its totient is φ = 33219648.

The previous prime is 68021869. The next prime is 68021897. The reversal of 68021872 is 27812086.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 48747 + ... + 50122.

It is an arithmetic number, because the mean of its divisors is an integer number (6742934).

Almost surely, 2^68021872 is an apocalyptic number.

It is an amenable number.

68021872 is a deficient number, since it is larger than the sum of its proper divisors (66836808).

68021872 is a wasteful number, since it uses less digits than its factorization.

68021872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 98920 (or 98914 counting only the distinct ones).

The product of its (nonzero) digits is 10752, while the sum is 34.

The square root of 68021872 is about 8247.5373294093. The cubic root of 68021872 is about 408.2092672459.

The spelling of 68021872 in words is "sixty-eight million, twenty-one thousand, eight hundred seventy-two".