428502 has 16 divisors (see below), whose sum is σ = 907632. Its totient is φ = 134400.

The previous prime is 428489. The next prime is 428503. The reversal of 428502 is 205824.

428502 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×428502² = 367227928008, which contains 22 as substring.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 428502.

It is not an unprimeable number, because it can be changed into a prime (428503) by changing a digit.

428502 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 in 7 ways as a sum of consecutive naturals, for example, 1999 + ... + 2202.

It is an arithmetic number, because the mean of its divisors is an integer number (56727).

2⁴²⁸⁵⁰² is an apocalyptic number.

428502 is an abundant number, since it is smaller than the sum of its proper divisors (479130).

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

428502 is a wasteful number, since it uses less digits than its factorization.

428502 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4223.

The product of its (nonzero) digits is 640, while the sum is 21.

The square root of 428502 is about 654.6006416129. The cubic root of 428502 is about 75.3906725769.

The spelling of 428502 in words is "four hundred twenty-eight thousand, five hundred two".