198732290436 has 81 divisors (see below), whose sum is σ = 506296472773. Its totient is φ = 65727867360.

The previous prime is 198732290431. The next prime is 198732290443. The reversal of 198732290436 is 634092237891.

The square root of 198732290436 is 445794.

It is a perfect power (a square), and thus also a powerful number.

198732290436 is a `hidden beast` number, since 1 + 98 + 7 + 32 + 2 + 90 + 436 = 666.

It can be written as a sum of positive squares in only one way, i.e., 46912960836 + 151819329600 = 216594^2 + 389640^2 .

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (198732290431) 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 26 ways as a sum of consecutive naturals, for example, 510879730 + ... + 510880118.

Almost surely, 2^198732290436 is an apocalyptic number.

198732290436 is the 445794-th square number.

It is an amenable number.

198732290436 is an abundant number, since it is smaller than the sum of its proper divisors (307564182337).

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

198732290436 is an equidigital number, since it uses as much as digits as its factorization.

With its predecessor (198732290435) it forms a Ruth-Aaron pair, since the sum of their distinct prime factors is the same (585).

198732290436 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1170 (or 585 counting only the distinct ones).

The product of its (nonzero) digits is 3919104, while the sum is 54.

The spelling of 198732290436 in words is "one hundred ninety-eight billion, seven hundred thirty-two million, two hundred ninety thousand, four hundred thirty-six".