198538408 has 32 divisors (see below), whose sum is σ = 391437000. Its totient is φ = 94268160.

The previous prime is 198538399. The next prime is 198538421. The reversal of 198538408 is 804835891.

It can be written as a sum of positive squares in 4 ways, for example, as 58400164 + 140138244 = 7642^2 + 11838^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7138 + ... + 21166.

Almost surely, 2^198538408 is an apocalyptic number.

It is an amenable number.

198538408 is a deficient number, since it is larger than the sum of its proper divisors (192898592).

198538408 is a wasteful number, since it uses less digits than its factorization.

198538408 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14125 (or 14121 counting only the distinct ones).

The product of its (nonzero) digits is 276480, while the sum is 46.

The square root of 198538408 is about 14090.3657865933. The cubic root of 198538408 is about 583.3754895974.

The spelling of 198538408 in words is "one hundred ninety-eight million, five hundred thirty-eight thousand, four hundred eight".