198521648 has 80 divisors (see below), whose sum is σ = 457845696. Its totient is φ = 82452480.

The previous prime is 198521629. The next prime is 198521651. The reversal of 198521648 is 846125891.

198521648 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 198521599 and 198521608.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 80108 + ... + 82548.

Almost surely, 2^198521648 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 198521648, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (228922848).

198521648 is an abundant number, since it is smaller than the sum of its proper divisors (259324048).

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

198521648 is a wasteful number, since it uses less digits than its factorization.

198521648 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2502 (or 2496 counting only the distinct ones).

The product of its digits is 138240, while the sum is 44.

The square root of 198521648 is about 14089.7710414329. The cubic root of 198521648 is about 583.3590735490.

The spelling of 198521648 in words is "one hundred ninety-eight million, five hundred twenty-one thousand, six hundred forty-eight".