2109622872 has 128 divisors (see below), whose sum is σ = 6181056000. Its totient is φ = 599760000.

The previous prime is 2109622849. The next prime is 2109622891. The reversal of 2109622872 is 2782269012.

It is a self number, because there is not a number n which added to its sum of digits gives 2109622872.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2065722 + ... + 2066742.

It is an arithmetic number, because the mean of its divisors is an integer number (48289500).

Almost surely, 2^2109622872 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 2109622872, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3090528000).

2109622872 is an abundant number, since it is smaller than the sum of its proper divisors (4071433128).

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

2109622872 is a wasteful number, since it uses less digits than its factorization.

2109622872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1302 (or 1284 counting only the distinct ones).

The product of its (nonzero) digits is 48384, while the sum is 39.

The square root of 2109622872 is about 45930.6310864547. The cubic root of 2109622872 is about 1282.5321927253.

The spelling of 2109622872 in words is "two billion, one hundred nine million, six hundred twenty-two thousand, eight hundred seventy-two".