6728784 has 40 divisors (see below), whose sum is σ = 17564352. Its totient is φ = 2219520.

The previous prime is 6728759. The next prime is 6728801. The reversal of 6728784 is 4878276.

It is an Ulam number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4264 + ... + 5624.

Almost surely, 2^6728784 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6728784, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (8782176).

6728784 is an abundant number, since it is smaller than the sum of its proper divisors (10835568).

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

6728784 is a wasteful number, since it uses less digits than its factorization.

6728784 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1475 (or 1469 counting only the distinct ones).

The product of its digits is 150528, while the sum is 42.

The square root of 6728784 is about 2593.9899768503. The cubic root of 6728784 is about 188.7899460796.

The spelling of 6728784 in words is "six million, seven hundred twenty-eight thousand, seven hundred eighty-four".