28605422087 has 8 divisors (see below), whose sum is σ = 31463816592. Its totient is φ = 26004927960.

The previous prime is 28605422063. The next prime is 28605422107. The reversal of 28605422087 is 78022450682.

It is not a de Polignac number, because 28605422087 - 2¹⁸ = 28605159943 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 (28605422057) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10744508 + ... + 10747169.

It is an arithmetic number, because the mean of its divisors is an integer number (3932977074).

Almost surely, 2^28605422087 is an apocalyptic number.

28605422087 is a deficient number, since it is larger than the sum of its proper divisors (2858394505).

28605422087 is an equidigital number, since it uses as much as digits as its factorization.

28605422087 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21491710 (or 21491688 counting only the distinct ones).

The product of its (nonzero) digits is 430080, while the sum is 44.

The spelling of 28605422087 in words is "twenty-eight billion, six hundred five million, four hundred twenty-two thousand, eighty-seven".