428047 has 2 divisors, whose sum is σ = 428048. Its totient is φ = 428046.

The previous prime is 428041. The next prime is 428083. The reversal of 428047 is 740824.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 428047 - 2³ = 428039 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (428041) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 214023 + 214024.

It is an arithmetic number, because the mean of its divisors is an integer number (214024).

2⁴²⁸⁰⁴⁷ is an apocalyptic number.

428047 is a deficient number, since it is larger than the sum of its proper divisors (1).

428047 is an equidigital number, since it uses as much as digits as its factorization.

428047 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1792, while the sum is 25.

The square root of 428047 is about 654.2530091639. The cubic root of 428047 is about 75.3639788823.

The spelling of 428047 in words is "four hundred twenty-eight thousand, forty-seven".