198541806 has 16 divisors (see below), whose sum is σ = 398866944. Its totient is φ = 65883384.

The previous prime is 198541789. The next prime is 198541807. The reversal of 198541806 is 608145891.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (198541807) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 72856 + ... + 75531.

It is an arithmetic number, because the mean of its divisors is an integer number (24929184).

Almost surely, 2^198541806 is an apocalyptic number.

198541806 is an abundant number, since it is smaller than the sum of its proper divisors (200325138).

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

198541806 is a wasteful number, since it uses less digits than its factorization.

198541806 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 148615.

The product of its (nonzero) digits is 69120, while the sum is 42.

The square root of 198541806 is about 14090.4863649201. The cubic root of 198541806 is about 583.3788177504.

The spelling of 198541806 in words is "one hundred ninety-eight million, five hundred forty-one thousand, eight hundred six".