198533980 has 12 divisors (see below), whose sum is σ = 416921400. Its totient is φ = 79413584.

The previous prime is 198533977. The next prime is 198533981. The reversal of 198533980 is 89335891.

It is a self number, because there is not a number n which added to its sum of digits gives 198533980.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (198533981) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4963330 + ... + 4963369.

It is an arithmetic number, because the mean of its divisors is an integer number (34743450).

Almost surely, 2^198533980 is an apocalyptic number.

198533980 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

198533980 is an abundant number, since it is smaller than the sum of its proper divisors (218387420).

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

198533980 is a wasteful number, since it uses less digits than its factorization.

198533980 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9926708 (or 9926706 counting only the distinct ones).

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

The square root of 198533980 is about 14090.2086570781. The cubic root of 198533980 is about 583.3711525594.

The spelling of 198533980 in words is "one hundred ninety-eight million, five hundred thirty-three thousand, nine hundred eighty".