428497 has 6 divisors (see below), whose sum is σ = 441798. Its totient is φ = 415584.

The previous prime is 428489. The next prime is 428503. The reversal of 428497 is 794824.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 96721 + 331776 = 311^2 + 576^2 .

It is not a de Polignac number, because 428497 - 2³ = 428489 is a prime.

It is a Duffinian 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 5 ways as a sum of consecutive naturals, for example, 1213 + ... + 1525.

It is an arithmetic number, because the mean of its divisors is an integer number (73633).

2⁴²⁸⁴⁹⁷ is an apocalyptic number.

It is an amenable number.

428497 is a deficient number, since it is larger than the sum of its proper divisors (13301).

428497 is an equidigital number, since it uses as much as digits as its factorization.

428497 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 387 (or 350 counting only the distinct ones).

The product of its digits is 16128, while the sum is 34.

The square root of 428497 is about 654.5968224793. The cubic root of 428497 is about 75.3903793423.

The spelling of 428497 in words is "four hundred twenty-eight thousand, four hundred ninety-seven".