201798 has 32 divisors (see below), whose sum is σ = 465120. Its totient is φ = 64800.

The previous prime is 201797. The next prime is 201809. The reversal of 201798 is 897102.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201791) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 1948 + ... + 2048.

It is an arithmetic number, because the mean of its divisors is an integer number (14535).

2²⁰¹⁷⁹⁸ is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 201798, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (232560).

201798 is an abundant number, since it is smaller than the sum of its proper divisors (263322).

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

201798 is a wasteful number, since it uses less digits than its factorization.

201798 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 149 (or 143 counting only the distinct ones).

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

The square root of 201798 is about 449.2193228257. The cubic root of 201798 is about 58.6550783470.

It can be divided in two parts, 201 and 798, that added together give a palindrome (999).

The spelling of 201798 in words is "two hundred one thousand, seven hundred ninety-eight".