28004744988576 has 144 divisors (see below), whose sum is σ = 80162456820264. Its totient is φ = 9273699182592.

The previous prime is 28004744988529. The next prime is 28004744988683. The reversal of 28004744988576 is 67588944740082.

28004744988576 is a `hidden beast` number, since 2 + 8 + 0 + 0 + 4 + 7 + 4 + 49 + 8 + 8 + 576 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 14164112898576 + 13840632090000 = 3763524^2 + 3720300^2 .

It is a tau number, because it is divible by the number of its divisors (144).

It is a Harshad number since it is a multiple of its sum of digits (72).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 26226270 + ... + 27273186.

Almost surely, 2^{28004744988576} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28004744988576, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (40081228410132).

28004744988576 is an abundant number, since it is smaller than the sum of its proper divisors (52157711831688).

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

28004744988576 is a wasteful number, since it uses less digits than its factorization.

28004744988576 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1047543 (or 1047532 counting only the distinct ones).

The product of its (nonzero) digits is 867041280, while the sum is 72.

The spelling of 28004744988576 in words is "twenty-eight trillion, four billion, seven hundred forty-four million, nine hundred eighty-eight thousand, five hundred seventy-six".