428885 has 8 divisors (see below), whose sum is σ = 531456. Its totient is φ = 331920.

The previous prime is 428873. The next prime is 428899. The reversal of 428885 is 588824.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 428885 - 2⁸ = 428629 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1229 + ... + 1538.

It is an arithmetic number, because the mean of its divisors is an integer number (66432).

2⁴²⁸⁸⁸⁵ is an apocalyptic number.

It is an amenable number.

428885 is a deficient number, since it is larger than the sum of its proper divisors (102571).

428885 is a wasteful number, since it uses less digits than its factorization.

428885 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2803.

The product of its digits is 20480, while the sum is 35.

The square root of 428885 is about 654.8931210511. The cubic root of 428885 is about 75.4131275705.

The spelling of 428885 in words is "four hundred twenty-eight thousand, eight hundred eighty-five".