2195864 has 16 divisors (see below), whose sum is σ = 4491720. Its totient is φ = 998080.

The previous prime is 2195863. The next prime is 2195867. The reversal of 2195864 is 4685912.

2195864 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2195861) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12389 + ... + 12564.

2^2195864 is an apocalyptic number.

It is an amenable number.

2195864 is an abundant number, since it is smaller than the sum of its proper divisors (2295856).

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

2195864 is a wasteful number, since it uses less digits than its factorization.

2195864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24970 (or 24966 counting only the distinct ones).

The product of its digits is 17280, while the sum is 35.

The square root of 2195864 is about 1481.8447961916. The cubic root of 2195864 is about 129.9775898254.

It can be divided in two parts, 21958 and 64, that added together give a palindrome (22022).

The spelling of 2195864 in words is "two million, one hundred ninety-five thousand, eight hundred sixty-four".