6890644044 has 72 divisors (see below), whose sum is σ = 18411272880. Its totient is φ = 2166912000.

The previous prime is 6890644031. The next prime is 6890644069. The reversal of 6890644044 is 4404460986.

It is a super-2 number, since 2×6890644044² = 94961950682225347872, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 143944 + ... + 185744.

Almost surely, 2^6890644044 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 6890644044, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (9205636440).

6890644044 is an abundant number, since it is smaller than the sum of its proper divisors (11520628836).

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

6890644044 is a wasteful number, since it uses less digits than its factorization.

6890644044 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42071 (or 42066 counting only the distinct ones).

The product of its (nonzero) digits is 663552, while the sum is 45.

The square root of 6890644044 is about 83009.9032887041. The cubic root of 6890644044 is about 1902.9174058177.

The spelling of 6890644044 in words is "six billion, eight hundred ninety million, six hundred forty-four thousand, forty-four".