397218 has 16 divisors (see below), whose sum is σ = 800640. Its totient is φ = 131376.

The previous prime is 397217. The next prime is 397223. The reversal of 397218 is 812793.

It is a happy number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 397218.

It is not an unprimeable number, because it can be changed into a prime (397211) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1296 + ... + 1572.

It is an arithmetic number, because the mean of its divisors is an integer number (50040).

2³⁹⁷²¹⁸ is an apocalyptic number.

397218 is an abundant number, since it is smaller than the sum of its proper divisors (403422).

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

397218 is a wasteful number, since it uses less digits than its factorization.

397218 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 521.

The product of its digits is 3024, while the sum is 30.

The square root of 397218 is about 630.2523304201. The cubic root of 397218 is about 73.5094161660.

The spelling of 397218 in words is "three hundred ninety-seven thousand, two hundred eighteen".