28888765408506 has 16 divisors (see below), whose sum is σ = 58036622886144. Its totient is φ = 9586406457984.

The previous prime is 28888765408457. The next prime is 28888765408537. The reversal of 28888765408506 is 60580456788882.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10795501431 + ... + 10795504106.

It is an arithmetic number, because the mean of its divisors is an integer number (3627288930384).

Almost surely, 2^{28888765408506} is an apocalyptic number.

28888765408506 is an abundant number, since it is smaller than the sum of its proper divisors (29147857477638).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28888765408506 is a wasteful number, since it uses less digits than its factorization.

28888765408506 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21591005765.

The product of its (nonzero) digits is 1651507200, while the sum is 75.

The spelling of 28888765408506 in words is "twenty-eight trillion, eight hundred eighty-eight billion, seven hundred sixty-five million, four hundred eight thousand, five hundred six".