68685728 has 24 divisors (see below), whose sum is σ = 141105888. Its totient is φ = 32849344.

The previous prime is 68685719. The next prime is 68685731. The reversal of 68685728 is 82758686.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 45926 + ... + 47397.

It is an arithmetic number, because the mean of its divisors is an integer number (5879412).

Almost surely, 2^68685728 is an apocalyptic number.

It is an amenable number.

68685728 is an abundant number, since it is smaller than the sum of its proper divisors (72420160).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

68685728 is a wasteful number, since it uses less digits than its factorization.

68685728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 93356 (or 93348 counting only the distinct ones).

The product of its digits is 1290240, while the sum is 50.

The square root of 68685728 is about 8287.6853222115. The cubic root of 68685728 is about 409.5329363062.

The spelling of 68685728 in words is "sixty-eight million, six hundred eighty-five thousand, seven hundred twenty-eight".