2165388 has 24 divisors (see below), whose sum is σ = 5190192. Its totient is φ = 702144.

The previous prime is 2165357. The next prime is 2165393. The reversal of 2165388 is 8835612.

It is a happy number.

It is an Ulam number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 1995 + ... + 2882.

It is an arithmetic number, because the mean of its divisors is an integer number (216258).

2^2165388 is an apocalyptic number.

It is an amenable number.

2165388 is an abundant number, since it is smaller than the sum of its proper divisors (3024804).

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

2165388 is a wasteful number, since it uses less digits than its factorization.

2165388 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4921 (or 4919 counting only the distinct ones).

The product of its digits is 11520, while the sum is 33.

The square root of 2165388 is about 1471.5257388167. The cubic root of 2165388 is about 129.3734745088.

The spelling of 2165388 in words is "two million, one hundred sixty-five thousand, three hundred eighty-eight".