2188544 has 36 divisors (see below), whose sum is σ = 4464096. Its totient is φ = 1070592.

The previous prime is 2188541. The next prime is 2188583. The reversal of 2188544 is 4458812.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (32).

It is a self number, because there is not a number n which added to its sum of digits gives 2188544.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2188541) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21197 + ... + 21299.

2^2188544 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 2188544, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2232048).

2188544 is an abundant number, since it is smaller than the sum of its proper divisors (2275552).

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

2188544 is an equidigital number, since it uses as much as digits as its factorization.

2188544 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 202 (or 188 counting only the distinct ones).

The product of its digits is 10240, while the sum is 32.

The square root of 2188544 is about 1479.3728400914. The cubic root of 2188544 is about 129.8330005527.

The spelling of 2188544 in words is "two million, one hundred eighty-eight thousand, five hundred forty-four".