198227231790 has 48 divisors (see below), whose sum is σ = 553418071632. Its totient is φ = 45309081216.

The previous prime is 198227231737. The next prime is 198227231929. The reversal of 198227231790 is 97132722891.

It is a congruent number.

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 67422759 + ... + 67425698.

It is an arithmetic number, because the mean of its divisors is an integer number (11529543159).

Almost surely, 2^198227231790 is an apocalyptic number.

198227231790 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

198227231790 is an abundant number, since it is smaller than the sum of its proper divisors (355190839842).

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

198227231790 is a wasteful number, since it uses less digits than its factorization.

198227231790 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 134848481 (or 134848474 counting only the distinct ones).

The product of its (nonzero) digits is 762048, while the sum is 51.

The spelling of 198227231790 in words is "one hundred ninety-eight billion, two hundred twenty-seven million, two hundred thirty-one thousand, seven hundred ninety".