6728689044 has 144 divisors (see below), whose sum is σ = 21342013056. Its totient is φ = 1736467200.

The previous prime is 6728689027. The next prime is 6728689061. The reversal of 6728689044 is 4409868276.

It is an interprime number because it is at equal distance from previous prime (6728689027) and next prime (6728689061).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 427474 + ... + 442934.

It is an arithmetic number, because the mean of its divisors is an integer number (148208424).

Almost surely, 2^6728689044 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 6728689044, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10671006528).

6728689044 is an abundant number, since it is smaller than the sum of its proper divisors (14613324012).

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

6728689044 is a wasteful number, since it uses less digits than its factorization.

6728689044 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15646 (or 15641 counting only the distinct ones).

The product of its (nonzero) digits is 4644864, while the sum is 54.

The square root of 6728689044 is about 82028.5867487670. The cubic root of 6728689044 is about 1887.8905801310.

The spelling of 6728689044 in words is "six billion, seven hundred twenty-eight million, six hundred eighty-nine thousand, forty-four".