28006808735 has 16 divisors (see below), whose sum is σ = 35381698560. Its totient is φ = 21223406880.

The previous prime is 28006808701. The next prime is 28006808743. The reversal of 28006808735 is 53780860082.

It is not a de Polignac number, because 28006808735 - 2¹⁴ = 28006792351 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 28006808735.

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, 961394 + ... + 990096.

It is an arithmetic number, because the mean of its divisors is an integer number (2211356160).

Almost surely, 2^28006808735 is an apocalyptic number.

28006808735 is a deficient number, since it is larger than the sum of its proper divisors (7374889825).

28006808735 is a wasteful number, since it uses less digits than its factorization.

28006808735 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38998.

The product of its (nonzero) digits is 645120, while the sum is 47.

The spelling of 28006808735 in words is "twenty-eight billion, six million, eight hundred eight thousand, seven hundred thirty-five".