198430705 has 8 divisors (see below), whose sum is σ = 259763904. Its totient is φ = 144313200.

The previous prime is 198430703. The next prime is 198430709. The reversal of 198430705 is 507034891.

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

It is not a de Polignac number, because 198430705 - 2¹ = 198430703 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (198430703) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1803861 + ... + 1803970.

It is an arithmetic number, because the mean of its divisors is an integer number (32470488).

Almost surely, 2^198430705 is an apocalyptic number.

It is an amenable number.

198430705 is a deficient number, since it is larger than the sum of its proper divisors (61333199).

198430705 is a wasteful number, since it uses less digits than its factorization.

198430705 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3607847.

The product of its (nonzero) digits is 30240, while the sum is 37.

The square root of 198430705 is about 14086.5434014168. The cubic root of 198430705 is about 583.2699807843.

The spelling of 198430705 in words is "one hundred ninety-eight million, four hundred thirty thousand, seven hundred five".