2166208 has 56 divisors (see below), whose sum is σ = 4992624. Its totient is φ = 921600.

The previous prime is 2166179. The next prime is 2166221. The reversal of 2166208 is 8026612.

It is a congruent 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, 11878 + ... + 12058.

It is an arithmetic number, because the mean of its divisors is an integer number (89154).

2^2166208 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2166208, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2496312).

2166208 is an abundant number, since it is smaller than the sum of its proper divisors (2826416).

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

2166208 is a wasteful number, since it uses less digits than its factorization.

2166208 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 221 (or 211 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 25.

The square root of 2166208 is about 1471.8043348217. The cubic root of 2166208 is about 129.3898030469.

The spelling of 2166208 in words is "two million, one hundred sixty-six thousand, two hundred eight".