28540505488 has 80 divisors (see below), whose sum is σ = 63921087360. Its totient is φ = 12200601600.

The previous prime is 28540505467. The next prime is 28540505501. The reversal of 28540505488 is 88450504582.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5206333 + ... + 5211811.

It is an arithmetic number, because the mean of its divisors is an integer number (799013592).

Almost surely, 2^28540505488 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 28540505488, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31960543680).

28540505488 is an abundant number, since it is smaller than the sum of its proper divisors (35380581872).

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

28540505488 is a wasteful number, since it uses less digits than its factorization.

28540505488 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7256 (or 7250 counting only the distinct ones).

The product of its (nonzero) digits is 2048000, while the sum is 49.

The spelling of 28540505488 in words is "twenty-eight billion, five hundred forty million, five hundred five thousand, four hundred eighty-eight".