197568864 has 36 divisors (see below), whose sum is σ = 561837276. Its totient is φ = 65856192.

The previous prime is 197568841. The next prime is 197568907. The reversal of 197568864 is 468865791.

197568864 is a `hidden beast` number, since 19 + 7 + 568 + 8 + 64 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a self number, because there is not a number n which added to its sum of digits gives 197568864.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 342714 + ... + 343289.

It is an arithmetic number, because the mean of its divisors is an integer number (15606591).

Almost surely, 2^197568864 is an apocalyptic number.

It is an amenable number.

197568864 is an abundant number, since it is smaller than the sum of its proper divisors (364268412).

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

197568864 is a wasteful number, since it uses less digits than its factorization.

197568864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 686019 (or 686008 counting only the distinct ones).

The product of its digits is 2903040, while the sum is 54.

The square root of 197568864 is about 14055.9191801888. The cubic root of 197568864 is about 582.4243194671.

The spelling of 197568864 in words is "one hundred ninety-seven million, five hundred sixty-eight thousand, eight hundred sixty-four".