2168885 has 4 divisors (see below), whose sum is σ = 2602668. Its totient is φ = 1735104.

The previous prime is 2168879. The next prime is 2168893. The reversal of 2168885 is 5888612.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 421201 + 1747684 = 649^2 + 1322^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2168885 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 216884 + ... + 216893.

It is an arithmetic number, because the mean of its divisors is an integer number (650667).

2^2168885 is an apocalyptic number.

It is an amenable number.

2168885 is a deficient number, since it is larger than the sum of its proper divisors (433783).

2168885 is an equidigital number, since it uses as much as digits as its factorization.

2168885 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 433782.

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

The square root of 2168885 is about 1472.7134819781. The cubic root of 2168885 is about 129.4430810818.

The spelling of 2168885 in words is "two million, one hundred sixty-eight thousand, eight hundred eighty-five".