198378892 has 24 divisors (see below), whose sum is σ = 350133840. Its totient is φ = 98345280.

The previous prime is 198378883. The next prime is 198378907. The reversal of 198378892 is 298873891.

It is a super-2 number, since 2×198378892² = 78708369582295328, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 355878 + ... + 356434.

It is an arithmetic number, because the mean of its divisors is an integer number (14588910).

Almost surely, 2^198378892 is an apocalyptic number.

It is an amenable number.

198378892 is a deficient number, since it is larger than the sum of its proper divisors (151754948).

198378892 is a wasteful number, since it uses less digits than its factorization.

198378892 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1161 (or 1159 counting only the distinct ones).

The product of its digits is 1741824, while the sum is 55.

The square root of 198378892 is about 14084.7041857470. The cubic root of 198378892 is about 583.2192097468.

The spelling of 198378892 in words is "one hundred ninety-eight million, three hundred seventy-eight thousand, eight hundred ninety-two".