28306421358528 has 224 divisors, whose sum is σ = 77047812172800. Its totient is φ = 9167153909760.

The previous prime is 28306421358473. The next prime is 28306421358539. The reversal of 28306421358528 is 82585312460382.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2599059963 + ... + 2599070853.

It is an arithmetic number, because the mean of its divisors is an integer number (343963447200).

Almost surely, 2^{28306421358528} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28306421358528, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (38523906086400).

28306421358528 is an abundant number, since it is smaller than the sum of its proper divisors (48741390814272).

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

28306421358528 is a wasteful number, since it uses less digits than its factorization.

28306421358528 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13035 (or 13025 counting only the distinct ones).

The product of its (nonzero) digits is 22118400, while the sum is 57.

The spelling of 28306421358528 in words is "twenty-eight trillion, three hundred six billion, four hundred twenty-one million, three hundred fifty-eight thousand, five hundred twenty-eight".