198938530 has 24 divisors (see below), whose sum is σ = 416553948. Its totient is φ = 68207328.

The previous prime is 198938527. The next prime is 198938543. The reversal of 198938530 is 35839891.

It can be written as a sum of positive squares in 2 ways, for example, as 196588441 + 2350089 = 14021^2 + 1533^2 .

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 11 ways as a sum of consecutive naturals, for example, 202509 + ... + 203488.

Almost surely, 2^198938530 is an apocalyptic number.

198938530 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

198938530 is an abundant number, since it is smaller than the sum of its proper divisors (217615418).

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

198938530 is a wasteful number, since it uses less digits than its factorization.

198938530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 406018 (or 406011 counting only the distinct ones).

The product of its (nonzero) digits is 233280, while the sum is 46.

The square root of 198938530 is about 14104.5570650056. The cubic root of 198938530 is about 583.7671262210.

The spelling of 198938530 in words is "one hundred ninety-eight million, nine hundred thirty-eight thousand, five hundred thirty".