28884788044849 has 15 divisors (see below), whose sum is σ = 31773784914235. Its totient is φ = 26258307032320.

The previous prime is 28884788044837. The next prime is 28884788044867. The reversal of 28884788044849 is 94844088748882.

The square root of 28884788044849 is 5374457.

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., 807167480625 + 28077620564224 = 898425^2 + 5298832^2 .

It is not a de Polignac number, because 28884788044849 - 2¹⁵ = 28884788012081 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28884788044349) by changing a digit.

It is a polite number, since it can be written in 14 ways as a sum of consecutive naturals, for example, 650287089 + ... + 650331505.

Almost surely, 2^{28884788044849} is an apocalyptic number.

28884788044849 is the 5374457-th square number.

28884788044849 is the 2687229-th centered octagonal number.

It is an amenable number.

28884788044849 is a deficient number, since it is larger than the sum of its proper divisors (2888996869386).

28884788044849 is an frugal number, since it uses more digits than its factorization.

28884788044849 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 88878 (or 44428 counting only the distinct ones).

The product of its (nonzero) digits is 8455716864, while the sum is 82.

The spelling of 28884788044849 in words is "twenty-eight trillion, eight hundred eighty-four billion, seven hundred eighty-eight million, forty-four thousand, eight hundred forty-nine".