28391576005 has 16 divisors (see below), whose sum is σ = 37015357680. Its totient is φ = 20780540928.

The previous prime is 28391575999. The next prime is 28391576011. The reversal of 28391576005 is 50067519382.

It is a Cunningham number, because it is equal to 168498²+1.

It is an interprime number because it is at equal distance from previous prime (28391575999) and next prime (28391576011).

It can be written as a sum of positive squares in 8 ways, for example, as 4292739361 + 24098836644 = 65519^2 + 155238^2 .

It is a cyclic number.

It is not a de Polignac number, because 28391576005 - 2²¹ = 28389478853 is a prime.

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, 1925370 + ... + 1940059.

It is an arithmetic number, because the mean of its divisors is an integer number (2313459855).

Almost surely, 2^28391576005 is an apocalyptic number.

It is an amenable number.

28391576005 is a deficient number, since it is larger than the sum of its proper divisors (8623781675).

28391576005 is a wasteful number, since it uses less digits than its factorization.

28391576005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3865560.

The product of its (nonzero) digits is 453600, while the sum is 46.

The spelling of 28391576005 in words is "twenty-eight billion, three hundred ninety-one million, five hundred seventy-six thousand, five".