198798458 has 8 divisors (see below), whose sum is σ = 298664820. Its totient is φ = 99243520.

The previous prime is 198798437. The next prime is 198798461. The reversal of 198798458 is 854897891.

198798458 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 189145009 + 9653449 = 13753^2 + 3107^2 .

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

It is a junction number, because it is equal to n+sod(n) for n = 198798397 and 198798406.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 76253 + ... + 78816.

Almost surely, 2^198798458 is an apocalyptic number.

198798458 is a deficient number, since it is larger than the sum of its proper divisors (99866362).

198798458 is a wasteful number, since it uses less digits than its factorization.

198798458 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 155712.

The product of its digits is 5806080, while the sum is 59.

The square root of 198798458 is about 14099.5907032793. The cubic root of 198798458 is about 583.6300845134.

The spelling of 198798458 in words is "one hundred ninety-eight million, seven hundred ninety-eight thousand, four hundred fifty-eight".