28271817285 has 16 divisors (see below), whose sum is σ = 45347722560. Its totient is φ = 15040697600.

The previous prime is 28271817271. The next prime is 28271817313. The reversal of 28271817285 is 58271817282.

It is a happy number.

It is not a de Polignac number, because 28271817285 - 2⁷ = 28271817157 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 15 ways as a sum of consecutive naturals, for example, 2344095 + ... + 2356124.

It is an arithmetic number, because the mean of its divisors is an integer number (2834232660).

Almost surely, 2^28271817285 is an apocalyptic number.

It is an amenable number.

28271817285 is a deficient number, since it is larger than the sum of its proper divisors (17075905275).

28271817285 is a wasteful number, since it uses less digits than its factorization.

28271817285 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4700628.

The product of its digits is 1003520, while the sum is 51.

It can be divided in two parts, 282718 and 17285, that added together give a palindrome (300003).

The spelling of 28271817285 in words is "twenty-eight billion, two hundred seventy-one million, eight hundred seventeen thousand, two hundred eighty-five".