68257928 has 36 divisors (see below), whose sum is σ = 134851815. Its totient is φ = 32388048.

The previous prime is 68257919. The next prime is 68257949. The reversal of 68257928 is 82975286.

It is a powerful number, because all its prime factors have an exponent greater than 1 and also an Achilles number because it is not a perfect power.

It can be written as a sum of positive squares in only one way, i.e., 34128964 + 34128964 = 5842^2 + 5842^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=5842.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 537401 + ... + 537527.

Almost surely, 2^68257928 is an apocalyptic number.

It is an amenable number.

68257928 is a deficient number, since it is larger than the sum of its proper divisors (66593887).

68257928 is a wasteful number, since it uses less digits than its factorization.

68257928 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 306 (or 152 counting only the distinct ones).

The product of its digits is 483840, while the sum is 47.

The square root of 68257928 is about 8261.8356313836. The cubic root of 68257928 is about 408.6809243379.

The spelling of 68257928 in words is "sixty-eight million, two hundred fifty-seven thousand, nine hundred twenty-eight".