505500198 has 64 divisors (see below), whose sum is σ = 1199308800. Its totient is φ = 138996000.

The previous prime is 505500197. The next prime is 505500211. The reversal of 505500198 is 891005505.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (505500197) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 258123 + ... + 260073.

It is an arithmetic number, because the mean of its divisors is an integer number (18739200).

Almost surely, 2^505500198 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 505500198, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (599654400).

505500198 is an abundant number, since it is smaller than the sum of its proper divisors (693808602).

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

505500198 is a wasteful number, since it uses less digits than its factorization.

505500198 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2193.

The product of its (nonzero) digits is 9000, while the sum is 33.

The square root of 505500198 is about 22483.3315591796. The cubic root of 505500198 is about 796.6002591270.

The spelling of 505500198 in words is "five hundred five million, five hundred thousand, one hundred ninety-eight".