428539 has 2 divisors, whose sum is σ = 428540. Its totient is φ = 428538.

The previous prime is 428531. The next prime is 428551. The reversal of 428539 is 935824.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 428539 - 2³ = 428531 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 428539.

It is not a weakly prime, because it can be changed into another prime (428531) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 214269 + 214270.

It is an arithmetic number, because the mean of its divisors is an integer number (214270).

2⁴²⁸⁵³⁹ is an apocalyptic number.

428539 is a deficient number, since it is larger than the sum of its proper divisors (1).

428539 is an equidigital number, since it uses as much as digits as its factorization.

428539 is an evil number, because the sum of its binary digits is even.

The product of its digits is 8640, while the sum is 31.

The square root of 428539 is about 654.6289025089. The cubic root of 428539 is about 75.3928424420.

The spelling of 428539 in words is "four hundred twenty-eight thousand, five hundred thirty-nine".