28586716825 has 24 divisors (see below), whose sum is σ = 36328924800. Its totient is φ = 22307712960.

The previous prime is 28586716789. The next prime is 28586716831. The reversal of 28586716825 is 52861768582.

It is not a de Polignac number, because 28586716825 - 2¹¹ = 28586714777 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 28586716825.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 76731 + ... + 251119.

It is an arithmetic number, because the mean of its divisors is an integer number (1513705200).

Almost surely, 2^28586716825 is an apocalyptic number.

28586716825 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

28586716825 is a deficient number, since it is larger than the sum of its proper divisors (7742207975).

28586716825 is a wasteful number, since it uses less digits than its factorization.

28586716825 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 174561 (or 174556 counting only the distinct ones).

The product of its digits is 12902400, while the sum is 58.

The spelling of 28586716825 in words is "twenty-eight billion, five hundred eighty-six million, seven hundred sixteen thousand, eight hundred twenty-five".