68003728 has 20 divisors (see below), whose sum is σ = 141892828. Its totient is φ = 31386240.

The previous prime is 68003687. The next prime is 68003737. The reversal of 68003728 is 82730086.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 43718544 + 24285184 = 6612^2 + 4928^2 .

It is a junction number, because it is equal to n+sod(n) for n = 68003693 and 68003702.

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 in 3 ways as a sum of consecutive naturals, for example, 163263 + ... + 163678.

Almost surely, 2^68003728 is an apocalyptic number.

It is an amenable number.

68003728 is an abundant number, since it is smaller than the sum of its proper divisors (73889100).

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

68003728 is a wasteful number, since it uses less digits than its factorization.

68003728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 326962 (or 326956 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 34.

The square root of 68003728 is about 8246.4372913398. The cubic root of 68003728 is about 408.1729690800.

The spelling of 68003728 in words is "sixty-eight million, three thousand, seven hundred twenty-eight".