198250 has 32 divisors (see below), whose sum is σ = 406224. Its totient is φ = 72000.

The previous prime is 198241. The next prime is 198251. The reversal of 198250 is 52891.

It can be written as a sum of positive squares in 8 ways, for example, as 19321 + 178929 = 139^2 + 423^2 .

It is a Harshad number since it is a multiple of its sum of digits (25).

It is not an unprimeable number, because it can be changed into a prime (198251) by changing a digit.

198250 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 15 ways as a sum of consecutive naturals, for example, 3220 + ... + 3280.

2¹⁹⁸²⁵⁰ is an apocalyptic number.

198250 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

198250 is an abundant number, since it is smaller than the sum of its proper divisors (207974).

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

198250 is a wasteful number, since it uses less digits than its factorization.

198250 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 91 (or 81 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 25.

The square root of 198250 is about 445.2527372179. The cubic root of 198250 is about 58.3092871412.

The spelling of 198250 in words is "one hundred ninety-eight thousand, two hundred fifty".