2188308 has 36 divisors (see below), whose sum is σ = 5432672. Its totient is φ = 685440.

The previous prime is 2188297. The next prime is 2188309. The reversal of 2188308 is 8038812.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2188309) 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 11 ways as a sum of consecutive naturals, for example, 3153 + ... + 3783.

2^2188308 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 2188308, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2716336).

2188308 is an abundant number, since it is smaller than the sum of its proper divisors (3244364).

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

2188308 is a wasteful number, since it uses less digits than its factorization.

2188308 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 672 (or 653 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 30.

The square root of 2188308 is about 1479.2930744109. The cubic root of 2188308 is about 129.8283335702.

The spelling of 2188308 in words is "two million, one hundred eighty-eight thousand, three hundred eight".