68160728 has 8 divisors (see below), whose sum is σ = 127801380. Its totient is φ = 34080360.

The previous prime is 68160727. The next prime is 68160731. The reversal of 68160728 is 82706186.

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

It is a junction number, because it is equal to n+sod(n) for n = 68160691 and 68160700.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68160727) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4260038 + ... + 4260053.

Almost surely, 2^68160728 is an apocalyptic number.

It is an amenable number.

68160728 is a deficient number, since it is larger than the sum of its proper divisors (59640652).

68160728 is a wasteful number, since it uses less digits than its factorization.

68160728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8520097 (or 8520093 counting only the distinct ones).

The product of its (nonzero) digits is 32256, while the sum is 38.

The square root of 68160728 is about 8255.9510657465. The cubic root of 68160728 is about 408.4868435542.

The spelling of 68160728 in words is "sixty-eight million, one hundred sixty thousand, seven hundred twenty-eight".