2184390 has 48 divisors (see below), whose sum is σ = 6119568. Its totient is φ = 537408.

The previous prime is 2184389. The next prime is 2184397. The reversal of 2184390 is 934812.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2184397) 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, 237 + ... + 2103.

It is an arithmetic number, because the mean of its divisors is an integer number (127491).

2^2184390 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2184390, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3059784).

2184390 is an abundant number, since it is smaller than the sum of its proper divisors (3935178).

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

2184390 is a wasteful number, since it uses less digits than its factorization.

2184390 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1893 (or 1890 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 27.

The square root of 2184390 is about 1477.9681999285. The cubic root of 2184390 is about 129.7508046772.

The spelling of 2184390 in words is "two million, one hundred eighty-four thousand, three hundred ninety".