198695438 has 16 divisors (see below), whose sum is σ = 300169584. Its totient is φ = 98641920.

The previous prime is 198695423. The next prime is 198695467. The reversal of 198695438 is 834596891.

It is a self number, because there is not a number n which added to its sum of digits gives 198695438.

It is a congruent number.

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 7 ways as a sum of consecutive naturals, for example, 293156 + ... + 293832.

It is an arithmetic number, because the mean of its divisors is an integer number (18760599).

Almost surely, 2^198695438 is an apocalyptic number.

198695438 is a deficient number, since it is larger than the sum of its proper divisors (101474146).

198695438 is a wasteful number, since it uses less digits than its factorization.

198695438 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1507.

The product of its digits is 1866240, while the sum is 53.

The square root of 198695438 is about 14095.9369323220. The cubic root of 198695438 is about 583.5292521413.

The spelling of 198695438 in words is "one hundred ninety-eight million, six hundred ninety-five thousand, four hundred thirty-eight".