188198 has 4 divisors (see below), whose sum is σ = 282300. Its totient is φ = 94098.

The previous prime is 188197. The next prime is 188249. The reversal of 188198 is 891881.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 891881 = 61 ⋅14621.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (188197) 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 as a sum of consecutive naturals, namely, 47048 + ... + 47051.

It is an arithmetic number, because the mean of its divisors is an integer number (70575).

2¹⁸⁸¹⁹⁸ is an apocalyptic number.

188198 is a deficient number, since it is larger than the sum of its proper divisors (94102).

188198 is an equidigital number, since it uses as much as digits as its factorization.

188198 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 94101.

The product of its digits is 4608, while the sum is 35.

The square root of 188198 is about 433.8179341613. The cubic root of 188198 is about 57.3066473369.

The spelling of 188198 in words is "one hundred eighty-eight thousand, one hundred ninety-eight".