210798 has 36 divisors (see below), whose sum is σ = 533520. Its totient is φ = 59976.

The previous prime is 210773. The next prime is 210803. The reversal of 210798 is 897012.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 210798.

It is an unprimeable number.

210798 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 763 + ... + 1001.

It is an arithmetic number, because the mean of its divisors is an integer number (14820).

2²¹⁰⁷⁹⁸ is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 210798, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (266760).

210798 is an abundant number, since it is smaller than the sum of its proper divisors (322722).

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

210798 is a wasteful number, since it uses less digits than its factorization.

210798 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 261 (or 251 counting only the distinct ones).

The product of its (nonzero) digits is 1008, while the sum is 27.

The square root of 210798 is about 459.1274332906. The cubic root of 210798 is about 59.5144140396.

The spelling of 210798 in words is "two hundred ten thousand, seven hundred ninety-eight".