28319358829 has 12 divisors (see below), whose sum is σ = 30816943668. Its totient is φ = 26003417600.

The previous prime is 28319358817. The next prime is 28319358857. The reversal of 28319358829 is 92885391382.

It can be written as a sum of positive squares in 6 ways, for example, as 2883204 + 28316475625 = 1698^2 + 168275^2 .

It is not a de Polignac number, because 28319358829 - 2¹¹ = 28319356781 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28319358629) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1183162 + ... + 1206859.

It is an arithmetic number, because the mean of its divisors is an integer number (2568078639).

Almost surely, 2^28319358829 is an apocalyptic number.

It is an amenable number.

28319358829 is a deficient number, since it is larger than the sum of its proper divisors (2497584839).

28319358829 is a wasteful number, since it uses less digits than its factorization.

28319358829 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2390096 (or 2390079 counting only the distinct ones).

The product of its digits is 7464960, while the sum is 58.

The spelling of 28319358829 in words is "twenty-eight billion, three hundred nineteen million, three hundred fifty-eight thousand, eight hundred twenty-nine".