28517874885370 has 16 divisors (see below), whose sum is σ = 55280803624200. Its totient is φ = 10529676880704.

The previous prime is 28517874885233. The next prime is 28517874885371. The reversal of 28517874885370 is 7358847871582.

It is a Cunningham number, because it is equal to 5340213²+1.

It can be written as a sum of positive squares in 4 ways, for example, as 10266429832129 + 18251445053241 = 3204127^2 + 4272171^2 .

It is a junction number, because it is equal to n+sod(n) for n = 28517874885293 and 28517874885302.

It is not an unprimeable number, because it can be changed into a prime (28517874885371) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 109684134045 + ... + 109684134304.

Almost surely, 2^{28517874885370} is an apocalyptic number.

28517874885370 is a deficient number, since it is larger than the sum of its proper divisors (26762928738830).

28517874885370 is a wasteful number, since it uses less digits than its factorization.

28517874885370 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 219368268369.

The product of its (nonzero) digits is 842956800, while the sum is 73.

The spelling of 28517874885370 in words is "twenty-eight trillion, five hundred seventeen billion, eight hundred seventy-four million, eight hundred eighty-five thousand, three hundred seventy".