198478 has 8 divisors (see below), whose sum is σ = 340272. Its totient is φ = 85056.

The previous prime is 198469. The next prime is 198479. The reversal of 198478 is 874891.

198478 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (198479) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7075 + ... + 7102.

It is an arithmetic number, because the mean of its divisors is an integer number (42534).

2¹⁹⁸⁴⁷⁸ is an apocalyptic number.

198478 is a deficient number, since it is larger than the sum of its proper divisors (141794).

198478 is a wasteful number, since it uses less digits than its factorization.

198478 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14186.

The product of its digits is 16128, while the sum is 37.

The square root of 198478 is about 445.5086980071. The cubic root of 198478 is about 58.3316316964.

It can be divided in two parts, 198 and 478, that added together give a palindrome (676).

The spelling of 198478 in words is "one hundred ninety-eight thousand, four hundred seventy-eight".