428528 has 10 divisors (see below), whose sum is σ = 830304. Its totient is φ = 214256.

The previous prime is 428509. The next prime is 428531. The reversal of 428528 is 825824.

It is a self number, because there is not a number n which added to its sum of digits gives 428528.

It is a congruent number.

It is an unprimeable number.

428528 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13376 + ... + 13407.

2⁴²⁸⁵²⁸ is an apocalyptic number.

It is an amenable number.

428528 is a deficient number, since it is larger than the sum of its proper divisors (401776).

428528 is a wasteful number, since it uses less digits than its factorization.

428528 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26791 (or 26785 counting only the distinct ones).

The product of its digits is 5120, while the sum is 29.

The square root of 428528 is about 654.6205007483. The cubic root of 428528 is about 75.3921973600.

The spelling of 428528 in words is "four hundred twenty-eight thousand, five hundred twenty-eight".