428807 has 2 divisors, whose sum is σ = 428808. Its totient is φ = 428806.

The previous prime is 428801. The next prime is 428809. The reversal of 428807 is 708824.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 428807 - 2⁸ = 428551 is a prime.

Together with 428809, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 428807.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 428807.

It is not a weakly prime, because it can be changed into another prime (428801) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 214403 + 214404.

It is an arithmetic number, because the mean of its divisors is an integer number (214404).

2⁴²⁸⁸⁰⁷ is an apocalyptic number.

428807 is a deficient number, since it is larger than the sum of its proper divisors (1).

428807 is an equidigital number, since it uses as much as digits as its factorization.

428807 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3584, while the sum is 29.

The square root of 428807 is about 654.8335666412. The cubic root of 428807 is about 75.4085555752.

The spelling of 428807 in words is "four hundred twenty-eight thousand, eight hundred seven".