428605 has 8 divisors (see below), whose sum is σ = 536832. Its totient is φ = 327888.

The previous prime is 428579. The next prime is 428629. The reversal of 428605 is 506824.

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

It is not a de Polignac number, because 428605 - 2⁹ = 428093 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 428605.

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, 1749 + ... + 1978.

It is an arithmetic number, because the mean of its divisors is an integer number (67104).

2⁴²⁸⁶⁰⁵ is an apocalyptic number.

It is an amenable number.

428605 is a deficient number, since it is larger than the sum of its proper divisors (108227).

428605 is a wasteful number, since it uses less digits than its factorization.

428605 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3755.

The product of its (nonzero) digits is 1920, while the sum is 25.

The square root of 428605 is about 654.6793108080. The cubic root of 428605 is about 75.3967127021.

The spelling of 428605 in words is "four hundred twenty-eight thousand, six hundred five".