28285843584 has 128 divisors (see below), whose sum is σ = 81495046080. Its totient is φ = 8657469440.

The previous prime is 28285843561. The next prime is 28285843589. The reversal of 28285843584 is 48534858282.

It is a tau number, because it is divible by the number of its divisors (128).

It is not an unprimeable number, because it can be changed into a prime (28285843589) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 214807 + ... + 320489.

Almost surely, 2^28285843584 is an apocalyptic number.

28285843584 is a gapful number since it is divisible by the number (24) 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 28285843584, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (40747523040).

28285843584 is an abundant number, since it is smaller than the sum of its proper divisors (53209202496).

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

28285843584 is a wasteful number, since it uses less digits than its factorization.

28285843584 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 105758 (or 105746 counting only the distinct ones).

The product of its digits is 19660800, while the sum is 57.

The spelling of 28285843584 in words is "twenty-eight billion, two hundred eighty-five million, eight hundred forty-three thousand, five hundred eighty-four".