397668 has 24 divisors (see below), whose sum is σ = 958720. Its totient is φ = 128160.

The previous prime is 397643. The next prime is 397673. The reversal of 397668 is 866793.

It is a nialpdrome in base 9.

It is an unprimeable number.

397668 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 163 + ... + 906.

2³⁹⁷⁶⁶⁸ is an apocalyptic number.

It is an amenable number.

397668 is an abundant number, since it is smaller than the sum of its proper divisors (561052).

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

397668 is a wasteful number, since it uses less digits than its factorization.

397668 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1107 (or 1105 counting only the distinct ones).

The product of its digits is 54432, while the sum is 39.

The square root of 397668 is about 630.6092292379. The cubic root of 397668 is about 73.5371647856.

The spelling of 397668 in words is "three hundred ninety-seven thousand, six hundred sixty-eight".