28009013087 has 24 divisors (see below), whose sum is σ = 31386661488. Its totient is φ = 24971112320.

The previous prime is 28009013083. The next prime is 28009013093. The reversal of 28009013087 is 78031090082.

It is not a de Polignac number, because 28009013087 - 2² = 28009013083 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 28009013087.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28009013083) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1365713 + ... + 1386069.

It is an arithmetic number, because the mean of its divisors is an integer number (1307777562).

Almost surely, 2^28009013087 is an apocalyptic number.

28009013087 is a deficient number, since it is larger than the sum of its proper divisors (3377648401).

28009013087 is a wasteful number, since it uses less digits than its factorization.

28009013087 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20599 (or 20588 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 38.

The spelling of 28009013087 in words is "twenty-eight billion, nine million, thirteen thousand, eighty-seven".