28885771488640 has 256 divisors, whose sum is σ = 81440856172800. Its totient is φ = 9682129428480.

The previous prime is 28885771488589. The next prime is 28885771488661. The reversal of 28885771488640 is 4688417758882.

It is a Harshad number since it is a multiple of its sum of digits (76).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2030847 + ... + 7867393.

It is an arithmetic number, because the mean of its divisors is an integer number (318128344425).

Almost surely, 2^{28885771488640} is an apocalyptic number.

28885771488640 is a gapful number since it is divisible by the number (20) 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 28885771488640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (40720428086400).

28885771488640 is an abundant number, since it is smaller than the sum of its proper divisors (52555084684160).

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

28885771488640 is a wasteful number, since it uses less digits than its factorization.

28885771488640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5836633 (or 5836621 counting only the distinct ones).

The product of its (nonzero) digits is 1541406720, while the sum is 76.

The spelling of 28885771488640 in words is "twenty-eight trillion, eight hundred eighty-five billion, seven hundred seventy-one million, four hundred eighty-eight thousand, six hundred forty".