198599664 has 80 divisors (see below), whose sum is σ = 544608000. Its totient is φ = 62227968.

The previous prime is 198599659. The next prime is 198599701. The reversal of 198599664 is 466995891.

It is a congruent number.

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, 63612 + ... + 66660.

It is an arithmetic number, because the mean of its divisors is an integer number (6807600).

Almost surely, 2^198599664 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 198599664, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (272304000).

198599664 is an abundant number, since it is smaller than the sum of its proper divisors (346008336).

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

198599664 is a wasteful number, since it uses less digits than its factorization.

198599664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3142 (or 3136 counting only the distinct ones).

The product of its digits is 4199040, while the sum is 57.

The square root of 198599664 is about 14092.5393027658. The cubic root of 198599664 is about 583.4354806335.

The spelling of 198599664 in words is "one hundred ninety-eight million, five hundred ninety-nine thousand, six hundred sixty-four".