398189 has 8 divisors (see below), whose sum is σ = 443232. Its totient is φ = 354640.

The previous prime is 398171. The next prime is 398207. The reversal of 398189 is 981893.

It is an interprime number because it is at equal distance from previous prime (398171) and next prime (398207).

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

It is a de Polignac number, because none of the positive numbers 2^k-398189 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 398189.

It is not an unprimeable number, because it can be changed into a prime (398119) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 242 + ... + 924.

It is an arithmetic number, because the mean of its divisors is an integer number (55404).

2³⁹⁸¹⁸⁹ is an apocalyptic number.

It is an amenable number.

398189 is a deficient number, since it is larger than the sum of its proper divisors (45043).

398189 is a wasteful number, since it uses less digits than its factorization.

398189 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 747.

The product of its digits is 15552, while the sum is 38.

The square root of 398189 is about 631.0221866147. The cubic root of 398189 is about 73.5692653849.

It can be divided in two parts, 39 and 8189, that added together give a palindrome (8228).

The spelling of 398189 in words is "three hundred ninety-eight thousand, one hundred eighty-nine".