2195840868 has 96 divisors (see below), whose sum is σ = 5821670400. Its totient is φ = 638596224.

The previous prime is 2195840789. The next prime is 2195840873. The reversal of 2195840868 is 8680485912.

2195840868 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 2195840868.

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, 2486355 + ... + 2487237.

It is an arithmetic number, because the mean of its divisors is an integer number (60642400).

Almost surely, 2^2195840868 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 2195840868, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2910835200).

2195840868 is an abundant number, since it is smaller than the sum of its proper divisors (3625829532).

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

2195840868 is a wasteful number, since it uses less digits than its factorization.

2195840868 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1761 (or 1759 counting only the distinct ones).

The product of its (nonzero) digits is 1105920, while the sum is 51.

The square root of 2195840868 is about 46859.8001276147. The cubic root of 2195840868 is about 1299.7713341397.

It can be divided in two parts, 21958 and 40868, that added together give a palindrome (62826).

The spelling of 2195840868 in words is "two billion, one hundred ninety-five million, eight hundred forty thousand, eight hundred sixty-eight".