6828991 has 8 divisors (see below), whose sum is σ = 7444080. Its totient is φ = 6226752.

The previous prime is 6828989. The next prime is 6829033. The reversal of 6828991 is 1998286.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 6828991 - 2¹ = 6828989 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6828911) 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, 2086 + ... + 4243.

It is an arithmetic number, because the mean of its divisors is an integer number (930510).

Almost surely, 2^6828991 is an apocalyptic number.

6828991 is a deficient number, since it is larger than the sum of its proper divisors (615089).

6828991 is a wasteful number, since it uses less digits than its factorization.

6828991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6425.

The product of its digits is 62208, while the sum is 43.

The square root of 6828991 is about 2613.2338203842. The cubic root of 6828991 is about 189.7225034987.

The spelling of 6828991 in words is "six million, eight hundred twenty-eight thousand, nine hundred ninety-one".