199598478 has 8 divisors (see below), whose sum is σ = 399196968. Its totient is φ = 66532824.

The previous prime is 199598473. The next prime is 199598489. The reversal of 199598478 is 874895991.

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

199598478 is an admirable number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (199598471) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16633201 + ... + 16633212.

It is an arithmetic number, because the mean of its divisors is an integer number (49899621).

Almost surely, 2^199598478 is an apocalyptic number.

199598478 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

199598478 is a wasteful number, since it uses less digits than its factorization.

199598478 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33266418.

The product of its digits is 6531840, while the sum is 60.

The square root of 199598478 is about 14127.9325451391. The cubic root of 199598478 is about 584.4119329723.

The spelling of 199598478 in words is "one hundred ninety-nine million, five hundred ninety-eight thousand, four hundred seventy-eight".