28894068480 has 144 divisors (see below), whose sum is σ = 92397957120. Its totient is φ = 7695273984.

The previous prime is 28894068449. The next prime is 28894068491. The reversal of 28894068480 is 8486049882.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 28894068480.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3309561 + ... + 3318279.

It is an arithmetic number, because the mean of its divisors is an integer number (641652480).

Almost surely, 2^28894068480 is an apocalyptic number.

28894068480 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 28894068480, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (46198978560).

28894068480 is an abundant number, since it is smaller than the sum of its proper divisors (63503888640).

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

28894068480 is an equidigital number, since it uses as much as digits as its factorization.

28894068480 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9606 (or 9592 counting only the distinct ones).

The product of its (nonzero) digits is 7077888, while the sum is 57.

The spelling of 28894068480 in words is "twenty-eight billion, eight hundred ninety-four million, sixty-eight thousand, four hundred eighty".