428750 has 40 divisors (see below), whose sum is σ = 937200. Its totient is φ = 147000.

The previous prime is 428741. The next prime is 428759. The reversal of 428750 is 57824.

428750 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (428741) and next prime (428759).

It is a plaindrome in base 16.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (428759) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 61247 + ... + 61253.

It is an arithmetic number, because the mean of its divisors is an integer number (23430).

428750 is a Friedman number, since it can be written as 70^4/(8*(5+2)), using all its digits and the basic arithmetic operations.

2⁴²⁸⁷⁵⁰ is an apocalyptic number.

428750 is an abundant number, since it is smaller than the sum of its proper divisors (508450).

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

428750 is an frugal number, since it uses more digits than its factorization.

428750 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43 (or 14 counting only the distinct ones).

The product of its (nonzero) digits is 2240, while the sum is 26.

The square root of 428750 is about 654.7900426854. The cubic root of 428750 is about 75.4052141511.

The spelling of 428750 in words is "four hundred twenty-eight thousand, seven hundred fifty".