28131585286 has 32 divisors (see below), whose sum is σ = 48980602368. Its totient is φ = 11868275520.

The previous prime is 28131585257. The next prime is 28131585289. The reversal of 28131585286 is 68258513182.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28131585289) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 508191 + ... + 560821.

It is an arithmetic number, because the mean of its divisors is an integer number (1530643824).

Almost surely, 2^28131585286 is an apocalyptic number.

28131585286 is a deficient number, since it is larger than the sum of its proper divisors (20849017082).

28131585286 is a wasteful number, since it uses less digits than its factorization.

28131585286 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53236.

The product of its digits is 921600, while the sum is 49.

The spelling of 28131585286 in words is "twenty-eight billion, one hundred thirty-one million, five hundred eighty-five thousand, two hundred eighty-six".