397424 has 20 divisors (see below), whose sum is σ = 784920. Its totient is φ = 194880.

The previous prime is 397379. The next prime is 397427. The reversal of 397424 is 424793.

397424 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a Smith number, since the sum of its digits (29) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (397427) by changing a digit.

397424 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 734 + ... + 1154.

It is an arithmetic number, because the mean of its divisors is an integer number (39246).

2³⁹⁷⁴²⁴ is an apocalyptic number.

It is an amenable number.

397424 is a deficient number, since it is larger than the sum of its proper divisors (387496).

397424 is a wasteful number, since it uses less digits than its factorization.

397424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 488 (or 482 counting only the distinct ones).

The product of its digits is 6048, while the sum is 29.

The square root of 397424 is about 630.4157358442. The cubic root of 397424 is about 73.5221214670.

The spelling of 397424 in words is "three hundred ninety-seven thousand, four hundred twenty-four".