198305540 has 24 divisors (see below), whose sum is σ = 434548800. Its totient is φ = 75873248.

The previous prime is 198305537. The next prime is 198305557. The reversal of 198305540 is 45503891.

198305540 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 198305540.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 215090 + ... + 216009.

It is an arithmetic number, because the mean of its divisors is an integer number (18106200).

Almost surely, 2^198305540 is an apocalyptic number.

198305540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

198305540 is an abundant number, since it is smaller than the sum of its proper divisors (236243260).

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

198305540 is a wasteful number, since it uses less digits than its factorization.

198305540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 431131 (or 431129 counting only the distinct ones).

The product of its (nonzero) digits is 21600, while the sum is 35.

The square root of 198305540 is about 14082.0999854425. The cubic root of 198305540 is about 583.1473177411.

The spelling of 198305540 in words is "one hundred ninety-eight million, three hundred five thousand, five hundred forty".