28810368775 has 12 divisors (see below), whose sum is σ = 37826320032. Its totient is φ = 21692512640.

The previous prime is 28810368751. The next prime is 28810368779. The reversal of 28810368775 is 57786301882.

It is a happy number.

It is not a de Polignac number, because 28810368775 - 2¹⁵ = 28810336007 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28810368779) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 33894127 + ... + 33894976.

It is an arithmetic number, because the mean of its divisors is an integer number (3152193336).

Almost surely, 2^28810368775 is an apocalyptic number.

28810368775 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

28810368775 is a deficient number, since it is larger than the sum of its proper divisors (9015951257).

28810368775 is a wasteful number, since it uses less digits than its factorization.

28810368775 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67789130 (or 67789125 counting only the distinct ones).

The product of its (nonzero) digits is 4515840, while the sum is 55.

The spelling of 28810368775 in words is "twenty-eight billion, eight hundred ten million, three hundred sixty-eight thousand, seven hundred seventy-five".