2188986 has 16 divisors (see below), whose sum is σ = 4411584. Its totient is φ = 724064.

The previous prime is 2188981. The next prime is 2188987. The reversal of 2188986 is 6898812.

2188986 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a d-powerful number, because it can be written as 2 + 1 + 8 + 8⁵ + 9⁵ + 8⁷ + 6 .

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2188981) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 510 + ... + 2153.

It is an arithmetic number, because the mean of its divisors is an integer number (275724).

2^2188986 is an apocalyptic number.

2188986 is an abundant number, since it is smaller than the sum of its proper divisors (2222598).

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

2188986 is a wasteful number, since it uses less digits than its factorization.

2188986 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2805.

The product of its digits is 55296, while the sum is 42.

The square root of 2188986 is about 1479.5222201779. The cubic root of 2188986 is about 129.8417403546.

The spelling of 2188986 in words is "two million, one hundred eighty-eight thousand, nine hundred eighty-six".