2163798 has 48 divisors (see below), whose sum is σ = 5774496. Its totient is φ = 570240.

The previous prime is 2163787. The next prime is 2163809. The reversal of 2163798 is 8973612.

It is an interprime number because it is at equal distance from previous prime (2163787) and next prime (2163809).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 978 + ... + 2298.

It is an arithmetic number, because the mean of its divisors is an integer number (120302).

2^2163798 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2163798, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2887248).

2163798 is an abundant number, since it is smaller than the sum of its proper divisors (3610698).

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

2163798 is a wasteful number, since it uses less digits than its factorization.

2163798 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1349 (or 1346 counting only the distinct ones).

The product of its digits is 18144, while the sum is 36.

The square root of 2163798 is about 1470.9853840198. The cubic root of 2163798 is about 129.3418013255.

The spelling of 2163798 in words is "two million, one hundred sixty-three thousand, seven hundred ninety-eight".