428540 has 24 divisors (see below), whose sum is σ = 1028832. Its totient is φ = 146880.

The previous prime is 428539. The next prime is 428551. The reversal of 428540 is 45824.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1391 + ... + 1670.

It is an arithmetic number, because the mean of its divisors is an integer number (42868).

2⁴²⁸⁵⁴⁰ is an apocalyptic number.

It is an amenable number.

428540 is an abundant number, since it is smaller than the sum of its proper divisors (600292).

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

428540 is a wasteful number, since it uses less digits than its factorization.

428540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3077 (or 3075 counting only the distinct ones).

The product of its (nonzero) digits is 1280, while the sum is 23.

The square root of 428540 is about 654.6296663000. The cubic root of 428540 is about 75.3929010852.

The spelling of 428540 in words is "four hundred twenty-eight thousand, five hundred forty".