28271539769 has 6 divisors (see below), whose sum is σ = 31075328970. Its totient is φ = 25701399680.

The previous prime is 28271539757. The next prime is 28271539831. The reversal of 28271539769 is 96793517282.

It can be written as a sum of positive squares in only one way, i.e., 27559984144 + 711555625 = 166012^2 + 26675^2 .

It is not a de Polignac number, because 28271539769 - 2¹⁶ = 28271474233 is a prime.

It is a super-2 number, since 2×28271539769² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (28271539729) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 116824424 + ... + 116824665.

It is an arithmetic number, because the mean of its divisors is an integer number (5179221495).

Almost surely, 2^28271539769 is an apocalyptic number.

It is an amenable number.

28271539769 is a deficient number, since it is larger than the sum of its proper divisors (2803789201).

28271539769 is a wasteful number, since it uses less digits than its factorization.

28271539769 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 233649111 (or 233649100 counting only the distinct ones).

The product of its digits is 11430720, while the sum is 59.

The spelling of 28271539769 in words is "twenty-eight billion, two hundred seventy-one million, five hundred thirty-nine thousand, seven hundred sixty-nine".