6881728 has 28 divisors (see below), whose sum is σ = 15607792. Its totient is φ = 2949120.

The previous prime is 6881713. The next prime is 6881731. The reversal of 6881728 is 8271886.

It is a tau number, because it is divible by the number of its divisors (28).

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 7233 + ... + 8128.

Almost surely, 2^6881728 is an apocalyptic number.

It is an amenable number.

6881728 is an abundant number, since it is smaller than the sum of its proper divisors (8726064).

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

6881728 is a wasteful number, since it uses less digits than its factorization.

6881728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15380 (or 15370 counting only the distinct ones).

The product of its digits is 43008, while the sum is 40.

The square root of 6881728 is about 2623.3047859523. The cubic root of 6881728 is about 190.2096301224.

It can be divided in two parts, 68 and 81728, that added together give a square (81796 = 286²).

The spelling of 6881728 in words is "six million, eight hundred eighty-one thousand, seven hundred twenty-eight".