28789406117 has 6 divisors (see below), whose sum is σ = 29508714834. Its totient is φ = 28087223840.

The previous prime is 28789406111. The next prime is 28789406123. The reversal of 28789406117 is 71160498782.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (28789406111) and next prime (28789406123).

It can be written as a sum of positive squares in 3 ways, for example, as 3804545761 + 24984860356 = 61681^2 + 158066^2 .

It is not a de Polignac number, because 28789406117 - 2⁴ = 28789406101 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 (28789406111) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 8561498 + ... + 8564859.

It is an arithmetic number, because the mean of its divisors is an integer number (4918119139).

Almost surely, 2^28789406117 is an apocalyptic number.

It is an amenable number.

28789406117 is a deficient number, since it is larger than the sum of its proper divisors (719308717).

28789406117 is an equidigital number, since it uses as much as digits as its factorization.

28789406117 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17126439 (or 17126398 counting only the distinct ones).

The product of its (nonzero) digits is 1354752, while the sum is 53.

The spelling of 28789406117 in words is "twenty-eight billion, seven hundred eighty-nine million, four hundred six thousand, one hundred seventeen".