198115388 has 6 divisors (see below), whose sum is σ = 346701936. Its totient is φ = 99057692.

The previous prime is 198115367. The next prime is 198115429. The reversal of 198115388 is 883511891.

It is a happy number.

It is a congruent number.

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 as a sum of consecutive naturals, namely, 24764420 + ... + 24764427.

It is an arithmetic number, because the mean of its divisors is an integer number (57783656).

Almost surely, 2^198115388 is an apocalyptic number.

It is an amenable number.

198115388 is a deficient number, since it is larger than the sum of its proper divisors (148586548).

198115388 is a wasteful number, since it uses less digits than its factorization.

198115388 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49528851 (or 49528849 counting only the distinct ones).

The product of its digits is 69120, while the sum is 44.

The square root of 198115388 is about 14075.3468163310. The cubic root of 198115388 is about 582.9608679322.

The spelling of 198115388 in words is "one hundred ninety-eight million, one hundred fifteen thousand, three hundred eighty-eight".