198548790 has 64 divisors (see below), whose sum is σ = 537788160. Its totient is φ = 46471040.

The previous prime is 198548767. The next prime is 198548807. The reversal of 198548790 is 97845891.

It is a Curzon number.

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 31 ways as a sum of consecutive naturals, for example, 804 + ... + 19943.

It is an arithmetic number, because the mean of its divisors is an integer number (8402940).

Almost surely, 2^198548790 is an apocalyptic number.

198548790 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 198548790, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (268894080).

198548790 is an abundant number, since it is smaller than the sum of its proper divisors (339239370).

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

198548790 is a wasteful number, since it uses less digits than its factorization.

198548790 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20797.

The product of its (nonzero) digits is 725760, while the sum is 51.

The square root of 198548790 is about 14090.7341895304. The cubic root of 198548790 is about 583.3856580728.

The spelling of 198548790 in words is "one hundred ninety-eight million, five hundred forty-eight thousand, seven hundred ninety".