428908 has 6 divisors (see below), whose sum is σ = 750596. Its totient is φ = 214452.

The previous prime is 428899. The next prime is 428951. The reversal of 428908 is 809824.

It is a self number, because there is not a number n which added to its sum of digits gives 428908.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 53610 + ... + 53617.

2⁴²⁸⁹⁰⁸ is an apocalyptic number.

It is an amenable number.

428908 is a deficient number, since it is larger than the sum of its proper divisors (321688).

428908 is a wasteful number, since it uses less digits than its factorization.

428908 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 107231 (or 107229 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 31.

The square root of 428908 is about 654.9106809329. The cubic root of 428908 is about 75.4144756171.

The spelling of 428908 in words is "four hundred twenty-eight thousand, nine hundred eight".