28240664608428 has 24 divisors (see below), whose sum is σ = 65903260420032. Its totient is φ = 9412358250384.

The previous prime is 28240664608381. The next prime is 28240664608459. The reversal of 28240664608428 is 82480646604282.

28240664608428 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

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, 149479050 + ... + 149667857.

It is an arithmetic number, because the mean of its divisors is an integer number (2745969184168).

Almost surely, 2^{28240664608428} is an apocalyptic number.

It is an amenable number.

28240664608428 is an abundant number, since it is smaller than the sum of its proper divisors (37662595811604).

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

28240664608428 is a wasteful number, since it uses less digits than its factorization.

28240664608428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 299154781 (or 299154779 counting only the distinct ones).

The product of its (nonzero) digits is 56623104, while the sum is 60.

The spelling of 28240664608428 in words is "twenty-eight trillion, two hundred forty billion, six hundred sixty-four million, six hundred eight thousand, four hundred twenty-eight".