428357 has 4 divisors (see below), whose sum is σ = 433260. Its totient is φ = 423456.

The previous prime is 428353. The next prime is 428369. The reversal of 428357 is 753824.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 198916 + 229441 = 446^2 + 479^2 .

It is a cyclic number.

It is not a de Polignac number, because 428357 - 2² = 428353 is a prime.

It is a Duffinian number.

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 428357.

It is not an unprimeable number, because it can be changed into a prime (428353) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2318 + ... + 2495.

It is an arithmetic number, because the mean of its divisors is an integer number (108315).

2⁴²⁸³⁵⁷ is an apocalyptic number.

It is an amenable number.

428357 is a deficient number, since it is larger than the sum of its proper divisors (4903).

428357 is an equidigital number, since it uses as much as digits as its factorization.

428357 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4902.

The product of its digits is 6720, while the sum is 29.

The square root of 428357 is about 654.4898776910. The cubic root of 428357 is about 75.3821678474.

The spelling of 428357 in words is "four hundred twenty-eight thousand, three hundred fifty-seven".