68072728 has 8 divisors (see below), whose sum is σ = 127636380. Its totient is φ = 34036360.

The previous prime is 68072717. The next prime is 68072747. The reversal of 68072728 is 82727086.

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

It is a congruent number.

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, 4254538 + ... + 4254553.

Almost surely, 2^68072728 is an apocalyptic number.

It is an amenable number.

68072728 is a deficient number, since it is larger than the sum of its proper divisors (59563652).

68072728 is a wasteful number, since it uses less digits than its factorization.

68072728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8509097 (or 8509093 counting only the distinct ones).

The product of its (nonzero) digits is 75264, while the sum is 40.

The square root of 68072728 is about 8250.6198555018. The cubic root of 68072728 is about 408.3109733510.

The spelling of 68072728 in words is "sixty-eight million, seventy-two thousand, seven hundred twenty-eight".