28350780867 has 8 divisors (see below), whose sum is σ = 42001156880. Its totient is φ = 18900520560.

The previous prime is 28350780833. The next prime is 28350780869. The reversal of 28350780867 is 76808705382.

It is not a de Polignac number, because 28350780867 - 2¹⁰ = 28350779843 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28350780869) by changing a digit.

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, 525014434 + ... + 525014487.

It is an arithmetic number, because the mean of its divisors is an integer number (5250144610).

Almost surely, 2^28350780867 is an apocalyptic number.

28350780867 is a gapful number since it is divisible by the number (27) formed by its first and last digit.

28350780867 is a deficient number, since it is larger than the sum of its proper divisors (13650376013).

28350780867 is a wasteful number, since it uses less digits than its factorization.

28350780867 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1050028930 (or 1050028924 counting only the distinct ones).

The product of its (nonzero) digits is 4515840, while the sum is 54.

The spelling of 28350780867 in words is "twenty-eight billion, three hundred fifty million, seven hundred eighty thousand, eight hundred sixty-seven".