28289573285 has 32 divisors (see below), whose sum is σ = 34691660640. Its totient is φ = 22142592000.

The previous prime is 28289573269. The next prime is 28289573293. The reversal of 28289573285 is 58237598282.

It can be written as a sum of positive squares in 16 ways, for example, as 351649 + 28289221636 = 593^2 + 168194^2 .

It is not a de Polignac number, because 28289573285 - 2⁴ = 28289573269 is a prime.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 15812171 + ... + 15813959.

It is an arithmetic number, because the mean of its divisors is an integer number (1084114395).

Almost surely, 2^28289573285 is an apocalyptic number.

It is an amenable number.

28289573285 is a deficient number, since it is larger than the sum of its proper divisors (6402087355).

28289573285 is a wasteful number, since it uses less digits than its factorization.

28289573285 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2249.

The product of its digits is 19353600, while the sum is 59.

The spelling of 28289573285 in words is "twenty-eight billion, two hundred eighty-nine million, five hundred seventy-three thousand, two hundred eighty-five".