428433 has 4 divisors (see below), whose sum is σ = 571248. Its totient is φ = 285620.

The previous prime is 428429. The next prime is 428471. The reversal of 428433 is 334824.

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 428433 - 2² = 428429 is a prime.

It is a D-number.

It is not an unprimeable number, because it can be changed into a prime (428473) 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, 71403 + ... + 71408.

It is an arithmetic number, because the mean of its divisors is an integer number (142812).

2⁴²⁸⁴³³ is an apocalyptic number.

It is an amenable number.

428433 is a deficient number, since it is larger than the sum of its proper divisors (142815).

428433 is a wasteful number, since it uses less digits than its factorization.

428433 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 142814.

The product of its digits is 2304, while the sum is 24.

The square root of 428433 is about 654.5479356014. The cubic root of 428433 is about 75.3866257380.

It can be divided in two parts, 428 and 433, that added together give a triangular number (861 = T₄₁).

The spelling of 428433 in words is "four hundred twenty-eight thousand, four hundred thirty-three".