197318286 has 144 divisors (see below), whose sum is σ = 518631984. Its totient is φ = 53568000.

The previous prime is 197318263. The next prime is 197318293. The reversal of 197318286 is 682813791.

197318286 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 3234696 + ... + 3234756.

It is an arithmetic number, because the mean of its divisors is an integer number (3601611).

Almost surely, 2^197318286 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 197318286, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (259315992).

197318286 is an abundant number, since it is smaller than the sum of its proper divisors (321313698).

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

197318286 is a wasteful number, since it uses less digits than its factorization.

197318286 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 159 (or 125 counting only the distinct ones).

The product of its digits is 145152, while the sum is 45.

The square root of 197318286 is about 14047.0027407985. The cubic root of 197318286 is about 582.1779843214.

The spelling of 197318286 in words is "one hundred ninety-seven million, three hundred eighteen thousand, two hundred eighty-six".