198888634 has 8 divisors (see below), whose sum is σ = 340951968. Its totient is φ = 85237980.

The previous prime is 198888619. The next prime is 198888671. The reversal of 198888634 is 436888891.

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

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, 7103152 + ... + 7103179.

It is an arithmetic number, because the mean of its divisors is an integer number (42618996).

Almost surely, 2^198888634 is an apocalyptic number.

198888634 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

198888634 is a deficient number, since it is larger than the sum of its proper divisors (142063334).

198888634 is a wasteful number, since it uses less digits than its factorization.

198888634 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14206340.

The product of its digits is 2654208, while the sum is 55.

The square root of 198888634 is about 14102.7881640476. The cubic root of 198888634 is about 583.7183170402.

The spelling of 198888634 in words is "one hundred ninety-eight million, eight hundred eighty-eight thousand, six hundred thirty-four".