198432078 has 32 divisors (see below), whose sum is σ = 433423872. Its totient is φ = 60194400.

The previous prime is 198432071. The next prime is 198432089. The reversal of 198432078 is 870234891.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (198432071) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 12378 + ... + 23453.

It is an arithmetic number, because the mean of its divisors is an integer number (13544496).

Almost surely, 2^198432078 is an apocalyptic number.

198432078 is an abundant number, since it is smaller than the sum of its proper divisors (234991794).

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

198432078 is a wasteful number, since it uses less digits than its factorization.

198432078 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35920.

The product of its (nonzero) digits is 96768, while the sum is 42.

The square root of 198432078 is about 14086.5921357864. The cubic root of 198432078 is about 583.2713260530.

The spelling of 198432078 in words is "one hundred ninety-eight million, four hundred thirty-two thousand, seventy-eight".