198556530 has 16 divisors (see below), whose sum is σ = 476535744. Its totient is φ = 52948400.

The previous prime is 198556513. The next prime is 198556571. The reversal of 198556530 is 35655891.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3309246 + ... + 3309305.

It is an arithmetic number, because the mean of its divisors is an integer number (29783484).

Almost surely, 2^198556530 is an apocalyptic number.

198556530 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

198556530 is an abundant number, since it is smaller than the sum of its proper divisors (277979214).

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

198556530 is a wasteful number, since it uses less digits than its factorization.

198556530 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6618561.

The product of its (nonzero) digits is 162000, while the sum is 42.

The square root of 198556530 is about 14091.0088354241. The cubic root of 198556530 is about 583.3932386551.

The spelling of 198556530 in words is "one hundred ninety-eight million, five hundred fifty-six thousand, five hundred thirty".