198387 has 24 divisors (see below), whose sum is σ = 339456. Its totient is φ = 109296.

The previous prime is 198377. The next prime is 198391. The reversal of 198387 is 783891.

It is not a de Polignac number, because 198387 - 2⁶ = 198323 is a prime.

It is an Ulam number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 198387.

It is not an unprimeable number, because it can be changed into a prime (198337) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2928 + ... + 2994.

It is an arithmetic number, because the mean of its divisors is an integer number (14144).

2¹⁹⁸³⁸⁷ is an apocalyptic number.

198387 is the 282-nd heptagonal number.

198387 is a deficient number, since it is larger than the sum of its proper divisors (141069).

198387 is a wasteful number, since it uses less digits than its factorization.

198387 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 127 (or 124 counting only the distinct ones).

The product of its digits is 12096, while the sum is 36.

The square root of 198387 is about 445.4065558566. The cubic root of 198387 is about 58.3227155278.

It can be divided in two parts, 198 and 387, that added together give a palindrome (585).

The spelling of 198387 in words is "one hundred ninety-eight thousand, three hundred eighty-seven".