195988398 has 16 divisors (see below), whose sum is σ = 396700416. Its totient is φ = 64542200.

The previous prime is 195988391. The next prime is 195988411. The reversal of 195988398 is 893889591.

It is a super-2 number, since 2×195988398² = 76822904301212808, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (195988391) by changing a digit.

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, 196278 + ... + 197273.

It is an arithmetic number, because the mean of its divisors is an integer number (24793776).

Almost surely, 2^195988398 is an apocalyptic number.

195988398 is an abundant number, since it is smaller than the sum of its proper divisors (200712018).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

195988398 is a wasteful number, since it uses less digits than its factorization.

195988398 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 393639.

The product of its digits is 5598720, while the sum is 60.

The square root of 195988398 is about 13999.5856367251. The cubic root of 195988398 is about 580.8671116452.

The spelling of 195988398 in words is "one hundred ninety-five million, nine hundred eighty-eight thousand, three hundred ninety-eight".