2189490 has 32 divisors (see below), whose sum is σ = 5348160. Its totient is φ = 573504.

The previous prime is 2189477. The next prime is 2189491. The reversal of 2189490 is 949812.

It is an alternating number because its digits alternate between even and odd.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (2189491) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1152 + ... + 2388.

It is an arithmetic number, because the mean of its divisors is an integer number (167130).

2^2189490 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2189490, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2674080).

2189490 is an abundant number, since it is smaller than the sum of its proper divisors (3158670).

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

2189490 is a wasteful number, since it uses less digits than its factorization.

2189490 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1306.

The product of its (nonzero) digits is 5184, while the sum is 33.

The square root of 2189490 is about 1479.6925356303. The cubic root of 2189490 is about 129.8517046662.

The spelling of 2189490 in words is "two million, one hundred eighty-nine thousand, four hundred ninety".