680003728 has 40 divisors (see below), whose sum is σ = 1337414400. Its totient is φ = 334890624.

The previous prime is 680003719. The next prime is 680003729. The reversal of 680003728 is 827300086.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 680003693 and 680003702.

It is not an unprimeable number, because it can be changed into a prime (680003729) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 635578 + ... + 636646.

It is an arithmetic number, because the mean of its divisors is an integer number (33435360).

Almost surely, 2^680003728 is an apocalyptic number.

It is an amenable number.

680003728 is a deficient number, since it is larger than the sum of its proper divisors (657410672).

680003728 is a wasteful number, since it uses less digits than its factorization.

680003728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1639 (or 1633 counting only the distinct ones).

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

The square root of 680003728 is about 26076.8811018496. The cubic root of 680003728 is about 879.3675414268.

The spelling of 680003728 in words is "six hundred eighty million, three thousand, seven hundred twenty-eight".