28055004993 has 8 divisors (see below), whose sum is σ = 41562970400. Its totient is φ = 18703336644.

The previous prime is 28055004983. The next prime is 28055005037. The reversal of 28055004993 is 39940055082.

28055004993 is a `hidden beast` number, since 2 + 8 + 0 + 550 + 0 + 4 + 9 + 93 = 666.

It is a de Polignac number, because none of the positive numbers 2^k-28055004993 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (28055004983) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 519537103 + ... + 519537156.

It is an arithmetic number, because the mean of its divisors is an integer number (5195371300).

Almost surely, 2^28055004993 is an apocalyptic number.

It is an amenable number.

28055004993 is a deficient number, since it is larger than the sum of its proper divisors (13507965407).

28055004993 is a wasteful number, since it uses less digits than its factorization.

28055004993 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1039074268 (or 1039074262 counting only the distinct ones).

The product of its (nonzero) digits is 388800, while the sum is 45.

The spelling of 28055004993 in words is "twenty-eight billion, fifty-five million, four thousand, nine hundred ninety-three".