28987915488 has 288 divisors, whose sum is σ = 92102427648. Its totient is φ = 7951104000.

The previous prime is 28987915477. The next prime is 28987915501. The reversal of 28987915488 is 88451978982.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 19977163 + ... + 19978613.

It is an arithmetic number, because the mean of its divisors is an integer number (319800096).

Almost surely, 2^28987915488 is an apocalyptic number.

28987915488 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 28987915488, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (46051213824).

28987915488 is an abundant number, since it is smaller than the sum of its proper divisors (63114512160).

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

28987915488 is a wasteful number, since it uses less digits than its factorization.

28987915488 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1646 (or 1631 counting only the distinct ones).

The product of its digits is 92897280, while the sum is 69.

The spelling of 28987915488 in words is "twenty-eight billion, nine hundred eighty-seven million, nine hundred fifteen thousand, four hundred eighty-eight".