6987728 has 20 divisors (see below), whose sum is σ = 14769888. Its totient is φ = 3176160.

The previous prime is 6987727. The next prime is 6987737. The reversal of 6987728 is 8277896.

6987728 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6987727) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19676 + ... + 20027.

Almost surely, 2^6987728 is an apocalyptic number.

It is an amenable number.

6987728 is an abundant number, since it is smaller than the sum of its proper divisors (7782160).

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

6987728 is a wasteful number, since it uses less digits than its factorization.

6987728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39722 (or 39716 counting only the distinct ones).

The product of its digits is 338688, while the sum is 47.

The square root of 6987728 is about 2643.4311036984. The cubic root of 6987728 is about 191.1812648321.

The spelling of 6987728 in words is "six million, nine hundred eighty-seven thousand, seven hundred twenty-eight".