397164188 has 12 divisors (see below), whose sum is σ = 717458112. Its totient is φ = 192176160.

The previous prime is 397164169. The next prime is 397164199. The reversal of 397164188 is 881461793.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1601345 + ... + 1601592.

It is an arithmetic number, because the mean of its divisors is an integer number (59788176).

Almost surely, 2^397164188 is an apocalyptic number.

It is an amenable number.

397164188 is a deficient number, since it is larger than the sum of its proper divisors (320293924).

397164188 is a wasteful number, since it uses less digits than its factorization.

397164188 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3202972 (or 3202970 counting only the distinct ones).

The product of its digits is 290304, while the sum is 47.

The square root of 397164188 is about 19928.9785990151. The cubic root of 397164188 is about 735.0609652178.

The spelling of 397164188 in words is "three hundred ninety-seven million, one hundred sixty-four thousand, one hundred eighty-eight".