28518271488 has 480 divisors, whose sum is σ = 99710582400. Its totient is φ = 7673315328.

The previous prime is 28518271433. The next prime is 28518271501. The reversal of 28518271488 is 88417281582.

It is a happy number.

28518271488 is a `hidden beast` number, since 2 + 85 + 1 + 82 + 7 + 1 + 488 = 666.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 40222878 + ... + 40223586.

It is an arithmetic number, because the mean of its divisors is an integer number (207730380).

Almost surely, 2^28518271488 is an apocalyptic number.

28518271488 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28518271488, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (49855291200).

28518271488 is an abundant number, since it is smaller than the sum of its proper divisors (71192310912).

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

28518271488 is a wasteful number, since it uses less digits than its factorization.

28518271488 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 812 (or 793 counting only the distinct ones).

The product of its digits is 2293760, while the sum is 54.

The spelling of 28518271488 in words is "twenty-eight billion, five hundred eighteen million, two hundred seventy-one thousand, four hundred eighty-eight".