2186440144 has 20 divisors (see below), whose sum is σ = 4841403424. Its totient is φ = 937045728.

The previous prime is 2186440121. The next prime is 2186440163. The reversal of 2186440144 is 4410446812.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9760782 + ... + 9761005.

Almost surely, 2^2186440144 is an apocalyptic number.

It is an amenable number.

2186440144 is an abundant number, since it is smaller than the sum of its proper divisors (2654963280).

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

2186440144 is a wasteful number, since it uses less digits than its factorization.

2186440144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19521802 (or 19521796 counting only the distinct ones).

The product of its (nonzero) digits is 24576, while the sum is 34.

The square root of 2186440144 is about 46759.3856247064. The cubic root of 2186440144 is about 1297.9138422224.

Adding to 2186440144 its reverse (4410446812), we get a palindrome (6596886956).

The spelling of 2186440144 in words is "two billion, one hundred eighty-six million, four hundred forty thousand, one hundred forty-four".