428432 has 10 divisors (see below), whose sum is σ = 830118. Its totient is φ = 214208.

The previous prime is 428429. The next prime is 428471. The reversal of 428432 is 234824.

It can be written as a sum of positive squares in only one way, i.e., 295936 + 132496 = 544^2 + 364^2 .

It is a junction number, because it is equal to n+sod(n) for n = 428398 and 428407.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 428432.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 13373 + ... + 13404.

2⁴²⁸⁴³² is an apocalyptic number.

It is an amenable number.

428432 is a deficient number, since it is larger than the sum of its proper divisors (401686).

428432 is a wasteful number, since it uses less digits than its factorization.

428432 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26785 (or 26779 counting only the distinct ones).

The product of its digits is 1536, while the sum is 23.

The square root of 428432 is about 654.5471717149. The cubic root of 428432 is about 75.3865670850.

The spelling of 428432 in words is "four hundred twenty-eight thousand, four hundred thirty-two".