6891328 has 56 divisors (see below), whose sum is σ = 14630400. Its totient is φ = 3214848.

The previous prime is 6891323. The next prime is 6891337. The reversal of 6891328 is 8231986.

6891328 is a nontrivial binomial coefficient, being equal to C(3713, 2).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6891323) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 87193 + ... + 87271.

Almost surely, 2^6891328 is an apocalyptic number.

6891328 is the 3712-nd triangular number.

6891328 is the 1238-th centered nonagonal number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6891328, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (7315200).

6891328 is an abundant number, since it is smaller than the sum of its proper divisors (7739072).

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

6891328 is a wasteful number, since it uses less digits than its factorization.

6891328 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 167 (or 157 counting only the distinct ones).

The product of its digits is 20736, while the sum is 37.

The square root of 6891328 is about 2625.1339013467. The cubic root of 6891328 is about 190.2980364070.

The spelling of 6891328 in words is "six million, eight hundred ninety-one thousand, three hundred twenty-eight".