3109889920 has 64 divisors (see below), whose sum is σ = 7457158800. Its totient is φ = 1240178688.

The previous prime is 3109889897. The next prime is 3109889929. The reversal of 3109889920 is 299889013.

It is a tau number, because it is divible by the number of its divisors (64).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3109889929) 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, 208471 + ... + 222889.

Almost surely, 2^3109889920 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 3109889920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3728579400).

3109889920 is an abundant number, since it is smaller than the sum of its proper divisors (4347268880).

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

3109889920 is a wasteful number, since it uses less digits than its factorization.

3109889920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14775 (or 14763 counting only the distinct ones).

The product of its (nonzero) digits is 279936, while the sum is 49.

The square root of 3109889920 is about 55766.3870086632. The cubic root of 3109889920 is about 1459.6486800899.

The spelling of 3109889920 in words is "three billion, one hundred nine million, eight hundred eighty-nine thousand, nine hundred twenty".