2165888 has 16 divisors (see below), whose sum is σ = 4315110. Its totient is φ = 1082880.

The previous prime is 2165873. The next prime is 2165893. The reversal of 2165888 is 8885612.

It can be written as a sum of positive squares in only one way, i.e., 1658944 + 506944 = 1288^2 + 712^2 .

It is a tau number, because it is divible by the number of its divisors (16).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8333 + ... + 8588.

2^2165888 is an apocalyptic number.

It is an amenable number.

2165888 is a deficient number, since it is larger than the sum of its proper divisors (2149222).

2165888 is an equidigital number, since it uses as much as digits as its factorization.

2165888 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16935 (or 16923 counting only the distinct ones).

The product of its digits is 30720, while the sum is 38.

The square root of 2165888 is about 1471.6956207042. The cubic root of 2165888 is about 129.3834314248.

It can be divided in two parts, 2 and 165888, that multiplied together give a 4-th power (331776 = 24⁴).

The spelling of 2165888 in words is "two million, one hundred sixty-five thousand, eight hundred eighty-eight".