198398078 has 8 divisors (see below), whose sum is σ = 307197120. Its totient is φ = 95999040.

The previous prime is 198398029. The next prime is 198398111. The reversal of 198398078 is 870893891.

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

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1599923 + ... + 1600046.

It is an arithmetic number, because the mean of its divisors is an integer number (38399640).

Almost surely, 2^198398078 is an apocalyptic number.

198398078 is a deficient number, since it is larger than the sum of its proper divisors (108799042).

198398078 is a wasteful number, since it uses less digits than its factorization.

198398078 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3200002.

The product of its (nonzero) digits is 870912, while the sum is 53.

The square root of 198398078 is about 14085.3852627466. The cubic root of 198398078 is about 583.2380109458.

The spelling of 198398078 in words is "one hundred ninety-eight million, three hundred ninety-eight thousand, seventy-eight".