30198 has 16 divisors (see below), whose sum is σ = 69120. Its totient is φ = 8616.

The previous prime is 30197. The next prime is 30203. The reversal of 30198 is 89103.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30197) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 318 + ... + 401.

It is an arithmetic number, because the mean of its divisors is an integer number (4320).

2³⁰¹⁹⁸ is an apocalyptic number.

30198 is an abundant number, since it is smaller than the sum of its proper divisors (38922).

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 (34560).

30198 is a wasteful number, since it uses less digits than its factorization.

30198 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 731.

The product of its (nonzero) digits is 216, while the sum is 21.

The square root of 30198 is about 173.7757175212. The cubic root of 30198 is about 31.1405343336.

The spelling of 30198 in words is "thirty thousand, one hundred ninety-eight".