428008506928 has 40 divisors (see below), whose sum is σ = 865879379280. Its totient is φ = 204693699840.

The previous prime is 428008506869. The next prime is 428008506931. The reversal of 428008506928 is 829605800824.

It is a hoax number, since the sum of its digits (52) coincides with the sum of the digits of its distinct prime factors.

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, 4260783 + ... + 4360078.

It is an arithmetic number, because the mean of its divisors is an integer number (21646984482).

Almost surely, 2^428008506928 is an apocalyptic number.

It is an amenable number.

428008506928 is an abundant number, since it is smaller than the sum of its proper divisors (437870872352).

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

428008506928 is a wasteful number, since it uses less digits than its factorization.

428008506928 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8621005 (or 8620999 counting only the distinct ones).

The product of its (nonzero) digits is 2211840, while the sum is 52.

The spelling of 428008506928 in words is "four hundred twenty-eight billion, eight million, five hundred six thousand, nine hundred twenty-eight".