28887081444 has 81 divisors (see below), whose sum is σ = 79105430313. Its totient is φ = 8884253664.

The previous prime is 28887081439. The next prime is 28887081463. The reversal of 28887081444 is 44418078882.

The square root of 28887081444 is 169962.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 4273236900 + 24613844544 = 65370^2 + 156888^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 13255947 + ... + 13258125.

Almost surely, 2^28887081444 is an apocalyptic number.

28887081444 is the 169962-nd square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28887081444

28887081444 is an abundant number, since it is smaller than the sum of its proper divisors (50218348869).

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

28887081444 is a wasteful number, since it uses less digits than its factorization.

28887081444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4394 (or 2197 counting only the distinct ones).

The product of its (nonzero) digits is 3670016, while the sum is 54.

The spelling of 28887081444 in words is "twenty-eight billion, eight hundred eighty-seven million, eighty-one thousand, four hundred forty-four".