2105445040 has 40 divisors (see below), whose sum is σ = 5027468400. Its totient is φ = 819415296.

The previous prime is 2105445029. The next prime is 2105445061. The reversal of 2105445040 is 405445012.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (40).

It is a junction number, because it is equal to n+sod(n) for n = 2105444996 and 2105445014.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 352690 + ... + 358609.

It is an arithmetic number, because the mean of its divisors is an integer number (125686710).

Almost surely, 2^2105445040 is an apocalyptic number.

2105445040 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2105445040 is an abundant number, since it is smaller than the sum of its proper divisors (2922023360).

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

2105445040 is a wasteful number, since it uses less digits than its factorization.

2105445040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 711349 (or 711343 counting only the distinct ones).

The product of its (nonzero) digits is 3200, while the sum is 25.

The square root of 2105445040 is about 45885.1287455969. The cubic root of 2105445040 is about 1281.6850041784.

The spelling of 2105445040 in words is "two billion, one hundred five million, four hundred forty-five thousand, forty".