198501520 has 160 divisors (see below), whose sum is σ = 578534400. Its totient is φ = 61759488.

The previous prime is 198501509. The next prime is 198501533. The reversal of 198501520 is 25105891.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 275721 + ... + 276439.

It is an arithmetic number, because the mean of its divisors is an integer number (3615840).

Almost surely, 2^198501520 is an apocalyptic number.

198501520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 198501520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (289267200).

198501520 is an abundant number, since it is smaller than the sum of its proper divisors (380032880).

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

198501520 is a wasteful number, since it uses less digits than its factorization.

198501520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 785 (or 779 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 31.

The square root of 198501520 is about 14089.0567462836. The cubic root of 198501520 is about 583.3393573981.

The spelling of 198501520 in words is "one hundred ninety-eight million, five hundred one thousand, five hundred twenty".