68346728 has 8 divisors (see below), whose sum is σ = 128150130. Its totient is φ = 34173360.

The previous prime is 68346679. The next prime is 68346757. The reversal of 68346728 is 82764386.

It can be written as a sum of positive squares in only one way, i.e., 54789604 + 13557124 = 7402^2 + 3682^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 4271663 + ... + 4271678.

Almost surely, 2^68346728 is an apocalyptic number.

It is an amenable number.

68346728 is a deficient number, since it is larger than the sum of its proper divisors (59803402).

68346728 is a wasteful number, since it uses less digits than its factorization.

68346728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8543347 (or 8543343 counting only the distinct ones).

The product of its digits is 387072, while the sum is 44.

The square root of 68346728 is about 8267.2079930288. The cubic root of 68346728 is about 408.8580717209.

The spelling of 68346728 in words is "sixty-eight million, three hundred forty-six thousand, seven hundred twenty-eight".