428550 has 24 divisors (see below), whose sum is σ = 1063176. Its totient is φ = 114240.

The previous prime is 428539. The next prime is 428551. The reversal of 428550 is 55824.

It is a self number, because there is not a number n which added to its sum of digits gives 428550.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (428551) by changing a digit.

428550 is an untouchable number, because it is not equal to the sum of proper divisors of any 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 in 11 ways as a sum of consecutive naturals, for example, 1279 + ... + 1578.

It is an arithmetic number, because the mean of its divisors is an integer number (44299).

2⁴²⁸⁵⁵⁰ is an apocalyptic number.

428550 is an abundant number, since it is smaller than the sum of its proper divisors (634626).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

428550 is a wasteful number, since it uses less digits than its factorization.

428550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2872 (or 2867 counting only the distinct ones).

The product of its (nonzero) digits is 1600, while the sum is 24.

The square root of 428550 is about 654.6373041616. The cubic root of 428550 is about 75.3934875129.

The spelling of 428550 in words is "four hundred twenty-eight thousand, five hundred fifty".