198399558 has 32 divisors (see below), whose sum is σ = 477354240. Its totient is φ = 53701920.

The previous prime is 198399521. The next prime is 198399563. The reversal of 198399558 is 855993891.

198399558 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×198399558² = 78724769229190728, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (57).

It is a junction number, because it is equal to n+sod(n) for n = 198399498 and 198399507.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 123513 + ... + 125108.

It is an arithmetic number, because the mean of its divisors is an integer number (14917320).

Almost surely, 2^198399558 is an apocalyptic number.

198399558 is an abundant number, since it is smaller than the sum of its proper divisors (278954682).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

198399558 is a wasteful number, since it uses less digits than its factorization.

198399558 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 248652.

The product of its digits is 3499200, while the sum is 57.

The square root of 198399558 is about 14085.4377993728. The cubic root of 198399558 is about 583.2394612120.

The spelling of 198399558 in words is "one hundred ninety-eight million, three hundred ninety-nine thousand, five hundred fifty-eight".