2188328 has 16 divisors (see below), whose sum is σ = 4214580. Its totient is φ = 1064448.

The previous prime is 2188327. The next prime is 2188331. The reversal of 2188328 is 8238812.

It can be written as a sum of positive squares in 2 ways, for example, as 2184484 + 3844 = 1478^2 + 62^2 .

It is a junction number, because it is equal to n+sod(n) for n = 2188294 and 2188303.

It is not an unprimeable number, because it can be changed into a prime (2188327) 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, 3401 + ... + 3992.

2^2188328 is an apocalyptic number.

It is an amenable number.

2188328 is a deficient number, since it is larger than the sum of its proper divisors (2026252).

2188328 is a wasteful number, since it uses less digits than its factorization.

2188328 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7436 (or 7432 counting only the distinct ones).

The product of its digits is 6144, while the sum is 32.

The square root of 2188328 is about 1479.2998343811. The cubic root of 2188328 is about 129.8287290902.

The spelling of 2188328 in words is "two million, one hundred eighty-eight thousand, three hundred twenty-eight".