28271351329 has 4 divisors (see below), whose sum is σ = 30446070676. Its totient is φ = 26096631984.

The previous prime is 28271351309. The next prime is 28271351333. The reversal of 28271351329 is 92315317282.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1380271104 + 26891080225 = 37152^2 + 163985^2 .

It is a cyclic number.

It is not a de Polignac number, because 28271351329 - 2⁹ = 28271350817 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28271351309) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1087359654 + ... + 1087359679.

It is an arithmetic number, because the mean of its divisors is an integer number (7611517669).

Almost surely, 2^28271351329 is an apocalyptic number.

It is an amenable number.

28271351329 is a deficient number, since it is larger than the sum of its proper divisors (2174719347).

28271351329 is a wasteful number, since it uses less digits than its factorization.

28271351329 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2174719346.

The product of its digits is 181440, while the sum is 43.

The spelling of 28271351329 in words is "twenty-eight billion, two hundred seventy-one million, three hundred fifty-one thousand, three hundred twenty-nine".