2105879840 has 48 divisors (see below), whose sum is σ = 5021678592. Its totient is φ = 834472704.

The previous prime is 2105879833. The next prime is 2105879873. The reversal of 2105879840 is 489785012.

It is a junction number, because it is equal to n+sod(n) for n = 2105879791 and 2105879800.

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, 44384 + ... + 78623.

It is an arithmetic number, because the mean of its divisors is an integer number (104618304).

Almost surely, 2^2105879840 is an apocalyptic number.

2105879840 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2105879840 is an abundant number, since it is smaller than the sum of its proper divisors (2915798752).

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

2105879840 is a wasteful number, since it uses less digits than its factorization.

2105879840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 123129 (or 123121 counting only the distinct ones).

The product of its (nonzero) digits is 161280, while the sum is 44.

The square root of 2105879840 is about 45889.8664195049. The cubic root of 2105879840 is about 1281.7732259514.

The spelling of 2105879840 in words is "two billion, one hundred five million, eight hundred seventy-nine thousand, eight hundred forty".