28905537905 has 8 divisors (see below), whose sum is σ = 34733587200. Its totient is φ = 23093135856.

The previous prime is 28905537863. The next prime is 28905537931. The reversal of 28905537905 is 50973550982.

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

It is a cyclic number.

It is not a de Polignac number, because 28905537905 - 2¹² = 28905533809 is a prime.

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3907745 + ... + 3915134.

It is an arithmetic number, because the mean of its divisors is an integer number (4341698400).

Almost surely, 2^28905537905 is an apocalyptic number.

It is an amenable number.

28905537905 is a deficient number, since it is larger than the sum of its proper divisors (5828049295).

28905537905 is an equidigital number, since it uses as much as digits as its factorization.

28905537905 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7823623.

The product of its (nonzero) digits is 3402000, while the sum is 53.

The spelling of 28905537905 in words is "twenty-eight billion, nine hundred five million, five hundred thirty-seven thousand, nine hundred five".