2105489360 has 80 divisors (see below), whose sum is σ = 5344230864. Its totient is φ = 766734336.

The previous prime is 2105489333. The next prime is 2105489371. The reversal of 2105489360 is 639845012.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 303317056 + 1802172304 = 17416^2 + 42452^2 .

It is a tau number, because it is divible by the number of its divisors (80).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 62054 + ... + 89786.

Almost surely, 2^2105489360 is an apocalyptic number.

2105489360 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2105489360, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2672115432).

2105489360 is an abundant number, since it is smaller than the sum of its proper divisors (3238741504).

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

2105489360 is a wasteful number, since it uses less digits than its factorization.

2105489360 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27832 (or 27826 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 38.

The square root of 2105489360 is about 45885.6116881970. The cubic root of 2105489360 is about 1281.6939973493.

The spelling of 2105489360 in words is "two billion, one hundred five million, four hundred eighty-nine thousand, three hundred sixty".