6867728 has 40 divisors (see below), whose sum is σ = 16106112. Its totient is φ = 2769408.

The previous prime is 6867667. The next prime is 6867733. The reversal of 6867728 is 8277686.

It is a happy number.

It is an Ulam 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, 101 + ... + 3707.

Almost surely, 2^6867728 is an apocalyptic number.

6867728 is a gapful number since it is divisible by the number (68) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6867728, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (8053056).

6867728 is an abundant number, since it is smaller than the sum of its proper divisors (9238384).

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

6867728 is a wasteful number, since it uses less digits than its factorization.

6867728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3639 (or 3633 counting only the distinct ones).

The product of its digits is 225792, while the sum is 44.

The square root of 6867728 is about 2620.6350375434. The cubic root of 6867728 is about 190.0805567915.

The spelling of 6867728 in words is "six million, eight hundred sixty-seven thousand, seven hundred twenty-eight".