28198 has 8 divisors (see below), whose sum is σ = 44208. Its totient is φ = 13464.

The previous prime is 28183. The next prime is 28201. The reversal of 28198 is 89182.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 261 + ... + 352.

It is an arithmetic number, because the mean of its divisors is an integer number (5526).

2²⁸¹⁹⁸ is an apocalyptic number.

28198 is a deficient number, since it is larger than the sum of its proper divisors (16010).

28198 is a wasteful number, since it uses less digits than its factorization.

28198 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 638.

The product of its digits is 1152, while the sum is 28.

The square root of 28198 is about 167.9226012185. The cubic root of 28198 is about 30.4372984019.

The spelling of 28198 in words is "twenty-eight thousand, one hundred ninety-eight".