397428 has 12 divisors (see below), whose sum is σ = 927360. Its totient is φ = 132472.

The previous prime is 397427. The next prime is 397429. The reversal of 397428 is 824793.

397428 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (397427) and next prime (397429).

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

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

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 3 ways as a sum of consecutive naturals, for example, 16548 + ... + 16571.

It is an arithmetic number, because the mean of its divisors is an integer number (77280).

2³⁹⁷⁴²⁸ is an apocalyptic number.

It is an amenable number.

397428 is an abundant number, since it is smaller than the sum of its proper divisors (529932).

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

397428 is a wasteful number, since it uses less digits than its factorization.

397428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33126 (or 33124 counting only the distinct ones).

The product of its digits is 12096, while the sum is 33.

The square root of 397428 is about 630.4189083459. The cubic root of 397428 is about 73.5223681284.

Adding to 397428 its reverse (824793), we get a palindrome (1222221).

The spelling of 397428 in words is "three hundred ninety-seven thousand, four hundred twenty-eight".