28258255585 has 8 divisors (see below), whose sum is σ = 38754179136. Its totient is φ = 19377089520.

The previous prime is 28258255583. The next prime is 28258255589. The reversal of 28258255585 is 58555285282.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 28258255585 - 2¹ = 28258255583 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28258255583) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 403689331 + ... + 403689400.

It is an arithmetic number, because the mean of its divisors is an integer number (4844272392).

Almost surely, 2^28258255585 is an apocalyptic number.

It is an amenable number.

28258255585 is a deficient number, since it is larger than the sum of its proper divisors (10495923551).

28258255585 is an equidigital number, since it uses as much as digits as its factorization.

28258255585 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 807378743.

The product of its digits is 12800000, while the sum is 55.

The spelling of 28258255585 in words is "twenty-eight billion, two hundred fifty-eight million, two hundred fifty-five thousand, five hundred eighty-five".