19398 has 16 divisors (see below), whose sum is σ = 40176. Its totient is φ = 6240.

The previous prime is 19391. The next prime is 19403. The reversal of 19398 is 89391.

It is a happy number.

19398 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19391) by changing a digit.

19398 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 7 ways as a sum of consecutive naturals, for example, 288 + ... + 348.

It is an arithmetic number, because the mean of its divisors is an integer number (2511).

2¹⁹³⁹⁸ is an apocalyptic number.

19398 is an abundant number, since it is smaller than the sum of its proper divisors (20778).

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

It is a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20088).

19398 is a wasteful number, since it uses less digits than its factorization.

19398 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 119.

The product of its digits is 1944, while the sum is 30.

The square root of 19398 is about 139.2767030052. The cubic root of 19398 is about 26.8690504227.

The spelling of 19398 in words is "nineteen thousand, three hundred ninety-eight".