6780728 has 16 divisors (see below), whose sum is σ = 12876000. Its totient is φ = 3347136.

The previous prime is 6780707. The next prime is 6780743. The reversal of 6780728 is 8270876.

It is a junction number, because it is equal to n+sod(n) for n = 6780691 and 6780700.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4733 + ... + 5996.

It is an arithmetic number, because the mean of its divisors is an integer number (804750).

Almost surely, 2^6780728 is an apocalyptic number.

It is an amenable number.

6780728 is a deficient number, since it is larger than the sum of its proper divisors (6095272).

6780728 is a wasteful number, since it uses less digits than its factorization.

6780728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10814 (or 10810 counting only the distinct ones).

The product of its (nonzero) digits is 37632, while the sum is 38.

The square root of 6780728 is about 2603.9831028638. The cubic root of 6780728 is about 189.2745001137.

The spelling of 6780728 in words is "six million, seven hundred eighty thousand, seven hundred twenty-eight".