428397 has 4 divisors (see below), whose sum is σ = 571200. Its totient is φ = 285596.

The previous prime is 428369. The next prime is 428401. The reversal of 428397 is 793824.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-428397 is a prime.

It is a d-powerful number, because it can be written as 4⁹ + 2¹⁷ + 3 + 8⁵ + 9 + 7⁴ .

It is a D-number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (428297) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 71397 + ... + 71402.

It is an arithmetic number, because the mean of its divisors is an integer number (142800).

2⁴²⁸³⁹⁷ is an apocalyptic number.

It is an amenable number.

428397 is a deficient number, since it is larger than the sum of its proper divisors (142803).

428397 is a wasteful number, since it uses less digits than its factorization.

428397 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 142802.

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

The square root of 428397 is about 654.5204351279. The cubic root of 428397 is about 75.3845141713.

Adding to 428397 its reverse (793824), we get a palindrome (1222221).

The spelling of 428397 in words is "four hundred twenty-eight thousand, three hundred ninety-seven".