198216528 has 40 divisors (see below), whose sum is σ = 517824000. Its totient is φ = 65328384.

The previous prime is 198216527. The next prime is 198216559. The reversal of 198216528 is 825612891.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 198216528.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (198216521) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18928 + ... + 27471.

It is an arithmetic number, because the mean of its divisors is an integer number (12945600).

Almost surely, 2^198216528 is an apocalyptic number.

It is an amenable number.

198216528 is an abundant number, since it is smaller than the sum of its proper divisors (319607472).

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

198216528 is a wasteful number, since it uses less digits than its factorization.

198216528 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46499 (or 46493 counting only the distinct ones).

The product of its digits is 69120, while the sum is 42.

The square root of 198216528 is about 14078.9391645820. The cubic root of 198216528 is about 583.0600536176.

The spelling of 198216528 in words is "one hundred ninety-eight million, two hundred sixteen thousand, five hundred twenty-eight".