28308590928 has 60 divisors (see below), whose sum is σ = 79249877460. Its totient is φ = 9433202688.

The previous prime is 28308590897. The next prime is 28308590939. The reversal of 28308590928 is 82909580382.

28308590928 is a `hidden beast` number, since 28 + 3 + 0 + 8 + 590 + 9 + 28 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 22810665024 + 5497925904 = 151032^2 + 74148^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 449850 + ... + 508902.

It is an arithmetic number, because the mean of its divisors is an integer number (1320831291).

Almost surely, 2^28308590928 is an apocalyptic number.

It is an amenable number.

28308590928 is an abundant number, since it is smaller than the sum of its proper divisors (50941286532).

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

28308590928 is a wasteful number, since it uses less digits than its factorization.

28308590928 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62396 (or 62387 counting only the distinct ones).

The product of its (nonzero) digits is 2488320, while the sum is 54.

The spelling of 28308590928 in words is "twenty-eight billion, three hundred eight million, five hundred ninety thousand, nine hundred twenty-eight".