198530320 has 20 divisors (see below), whose sum is σ = 461583180. Its totient is φ = 79412096.

The previous prime is 198530291. The next prime is 198530351. The reversal of 198530320 is 23035891.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 102333456 + 96196864 = 10116^2 + 9808^2 .

It is a tau number, because it is divible by the number of its divisors (20).

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 3 ways as a sum of consecutive naturals, for example, 1240735 + ... + 1240894.

It is an arithmetic number, because the mean of its divisors is an integer number (23079159).

Almost surely, 2^198530320 is an apocalyptic number.

198530320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

198530320 is an abundant number, since it is smaller than the sum of its proper divisors (263052860).

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

198530320 is a wasteful number, since it uses less digits than its factorization.

198530320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2481642 (or 2481636 counting only the distinct ones).

The product of its (nonzero) digits is 6480, while the sum is 31.

The square root of 198530320 is about 14090.0787790559. The cubic root of 198530320 is about 583.3675676960.

The spelling of 198530320 in words is "one hundred ninety-eight million, five hundred thirty thousand, three hundred twenty".