6728904 has 144 divisors (see below), whose sum is σ = 22838400. Its totient is φ = 1752192.

The previous prime is 6728881. The next prime is 6728947. The reversal of 6728904 is 4098276.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a nontrivial repunit in base 23.

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 35 ways as a sum of consecutive naturals, for example, 85137 + ... + 85215.

It is an arithmetic number, because the mean of its divisors is an integer number (158600).

Almost surely, 2^6728904 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 6728904, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (11419200).

6728904 is an abundant number, since it is smaller than the sum of its proper divisors (16109496).

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

6728904 is a wasteful number, since it uses less digits than its factorization.

6728904 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 124 (or 104 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 36.

The square root of 6728904 is about 2594.0131071373. The cubic root of 6728904 is about 188.7910683556.

The spelling of 6728904 in words is "six million, seven hundred twenty-eight thousand, nine hundred four".