428133 has 4 divisors (see below), whose sum is σ = 570848. Its totient is φ = 285420.

The previous prime is 428093. The next prime is 428137. The reversal of 428133 is 331824.

It is a happy number.

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 not a de Polignac number, because 428133 - 2⁸ = 427877 is a prime.

It is a D-number.

It is a Duffinian number.

428133 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (428137) 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, 71353 + ... + 71358.

It is an arithmetic number, because the mean of its divisors is an integer number (142712).

2⁴²⁸¹³³ is an apocalyptic number.

It is an amenable number.

428133 is a deficient number, since it is larger than the sum of its proper divisors (142715).

428133 is a wasteful number, since it uses less digits than its factorization.

428133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 142714.

The product of its digits is 576, while the sum is 21.

The square root of 428133 is about 654.3187296723. The cubic root of 428133 is about 75.3690257332.

Adding to 428133 its reverse (331824), we get a palindrome (759957).

It can be divided in two parts, 428 and 133, that added together give a triangular number (561 = T₃₃).

The spelling of 428133 in words is "four hundred twenty-eight thousand, one hundred thirty-three".