198788 has 6 divisors (see below), whose sum is σ = 347886. Its totient is φ = 99392.

The previous prime is 198769. The next prime is 198811. The reversal of 198788 is 887891.

It can be written as a sum of positive squares in only one way, i.e., 107584 + 91204 = 328^2 + 302^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 24845 + ... + 24852.

It is an arithmetic number, because the mean of its divisors is an integer number (57981).

2¹⁹⁸⁷⁸⁸ is an apocalyptic number.

It is an amenable number.

198788 is a deficient number, since it is larger than the sum of its proper divisors (149098).

198788 is a wasteful number, since it uses less digits than its factorization.

198788 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49701 (or 49699 counting only the distinct ones).

The product of its digits is 32256, while the sum is 41.

The square root of 198788 is about 445.8564791500. The cubic root of 198788 is about 58.3619850178.

It can be divided in two parts, 1 and 98788, that added together give a palindrome (98789).

The spelling of 198788 in words is "one hundred ninety-eight thousand, seven hundred eighty-eight".