428333 has 4 divisors (see below), whose sum is σ = 429660. Its totient is φ = 427008.

The previous prime is 428303. The next prime is 428339. The reversal of 428333 is 333824.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 94249 + 334084 = 307^2 + 578^2 .

It is a cyclic number.

It is not a de Polignac number, because 428333 - 2¹⁰ = 427309 is a prime.

It is a d-powerful number, because it can be written as 4⁹ + 2¹⁷ + 3⁴ + 8⁵ + 3⁴ + 3⁷ .

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 428299 and 428308.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (428339) 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, 173 + ... + 941.

It is an arithmetic number, because the mean of its divisors is an integer number (107415).

2⁴²⁸³³³ is an apocalyptic number.

It is an amenable number.

428333 is a deficient number, since it is larger than the sum of its proper divisors (1327).

428333 is an equidigital number, since it uses as much as digits as its factorization.

428333 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1326.

The product of its digits is 1728, while the sum is 23.

The square root of 428333 is about 654.4715425441. The cubic root of 428333 is about 75.3807599829.

The spelling of 428333 in words is "four hundred twenty-eight thousand, three hundred thirty-three".