28873550313 has 24 divisors (see below), whose sum is σ = 42159757640. Its totient is φ = 19040313600.

The previous prime is 28873550269. The next prime is 28873550327. The reversal of 28873550313 is 31305537882.

28873550313 is a `hidden beast` number, since 2 + 8 + 87 + 3 + 550 + 3 + 13 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 4391315289 + 24482235024 = 66267^2 + 156468^2 .

It is not a de Polignac number, because 28873550313 - 2¹³ = 28873542121 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28873550353) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 565095 + ... + 614067.

Almost surely, 2^28873550313 is an apocalyptic number.

It is an amenable number.

28873550313 is a deficient number, since it is larger than the sum of its proper divisors (13286207327).

28873550313 is a wasteful number, since it uses less digits than its factorization.

28873550313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49689 (or 49686 counting only the distinct ones).

The product of its (nonzero) digits is 604800, while the sum is 45.

The spelling of 28873550313 in words is "twenty-eight billion, eight hundred seventy-three million, five hundred fifty thousand, three hundred thirteen".