198328765 has 16 divisors (see below), whose sum is σ = 240527232. Its totient is φ = 156985024.

The previous prime is 198328729. The next prime is 198328787. The reversal of 198328765 is 567823891.

It is a cyclic number.

It is not a de Polignac number, because 198328765 - 2²¹ = 196231613 is a prime.

It is a Duffinian number.

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, 223152 + ... + 224038.

It is an arithmetic number, because the mean of its divisors is an integer number (15032952).

Almost surely, 2^198328765 is an apocalyptic number.

It is an amenable number.

198328765 is a deficient number, since it is larger than the sum of its proper divisors (42198467).

198328765 is a wasteful number, since it uses less digits than its factorization.

198328765 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1316.

The product of its digits is 725760, while the sum is 49.

The square root of 198328765 is about 14082.9245897292. The cubic root of 198328765 is about 583.1700823896.

The spelling of 198328765 in words is "one hundred ninety-eight million, three hundred twenty-eight thousand, seven hundred sixty-five".