28854520505 has 8 divisors (see below), whose sum is σ = 35063721600. Its totient is φ = 22791418416.

The previous prime is 28854520493. The next prime is 28854520511. The reversal of 28854520505 is 50502545882.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28854520505 is a prime.

It is a Curzon number.

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, 36524315 + ... + 36525104.

It is an arithmetic number, because the mean of its divisors is an integer number (4382965200).

Almost surely, 2^28854520505 is an apocalyptic number.

It is an amenable number.

28854520505 is a deficient number, since it is larger than the sum of its proper divisors (6209201095).

28854520505 is an equidigital number, since it uses as much as digits as its factorization.

28854520505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73049503.

The product of its (nonzero) digits is 640000, while the sum is 44.

The spelling of 28854520505 in words is "twenty-eight billion, eight hundred fifty-four million, five hundred twenty thousand, five hundred five".