2188494 has 48 divisors (see below), whose sum is σ = 5915520. Its totient is φ = 568080.

The previous prime is 2188493. The next prime is 2188531. The reversal of 2188494 is 4948812.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2188493) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 597 + ... + 2175.

It is an arithmetic number, because the mean of its divisors is an integer number (123240).

2^2188494 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2188494, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2957760).

2188494 is an abundant number, since it is smaller than the sum of its proper divisors (3727026).

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

2188494 is a wasteful number, since it uses less digits than its factorization.

2188494 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1605 (or 1602 counting only the distinct ones).

The product of its digits is 18432, while the sum is 36.

The square root of 2188494 is about 1479.3559409419. The cubic root of 2188494 is about 129.8320118132.

The spelling of 2188494 in words is "two million, one hundred eighty-eight thousand, four hundred ninety-four".