428057 has 4 divisors (see below), whose sum is σ = 489216. Its totient is φ = 366900.

The previous prime is 428047. The next prime is 428083. The reversal of 428057 is 750824.

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 not a de Polignac number, because 428057 - 2⁴ = 428041 is a prime.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 428057.

It is not an unprimeable number, because it can be changed into a prime (428027) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 30569 + ... + 30582.

It is an arithmetic number, because the mean of its divisors is an integer number (122304).

2⁴²⁸⁰⁵⁷ is an apocalyptic number.

It is an amenable number.

428057 is a deficient number, since it is larger than the sum of its proper divisors (61159).

428057 is an equidigital number, since it uses as much as digits as its factorization.

428057 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61158.

The product of its (nonzero) digits is 2240, while the sum is 26.

The square root of 428057 is about 654.2606514227. The cubic root of 428057 is about 75.3645657602.

The spelling of 428057 in words is "four hundred twenty-eight thousand, fifty-seven".