6898644 has 36 divisors (see below), whose sum is σ = 17690400. Its totient is φ = 2266320.

The previous prime is 6898637. The next prime is 6898663. The reversal of 6898644 is 4468986.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (36).

It is a self number, because there is not a number n which added to its sum of digits gives 6898644.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1207 + ... + 3905.

It is an arithmetic number, because the mean of its divisors is an integer number (491400).

Almost surely, 2^6898644 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6898644, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (8845200).

6898644 is an abundant number, since it is smaller than the sum of its proper divisors (10791756).

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

6898644 is a wasteful number, since it uses less digits than its factorization.

6898644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2780 (or 2775 counting only the distinct ones).

The product of its digits is 331776, while the sum is 45.

The square root of 6898644 is about 2626.5269844416. The cubic root of 6898644 is about 190.3653542521.

The spelling of 6898644 in words is "six million, eight hundred ninety-eight thousand, six hundred forty-four".