28285628117 has 2 divisors, whose sum is σ = 28285628118. Its totient is φ = 28285628116.

The previous prime is 28285628099. The next prime is 28285628131. The reversal of 28285628117 is 71182658282.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20025363121 + 8260264996 = 141511^2 + 90886^2 .

It is a cyclic number.

It is not a de Polignac number, because 28285628117 - 2¹⁰ = 28285627093 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28285628197) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14142814058 + 14142814059.

It is an arithmetic number, because the mean of its divisors is an integer number (14142814059).

Almost surely, 2^28285628117 is an apocalyptic number.

It is an amenable number.

28285628117 is a deficient number, since it is larger than the sum of its proper divisors (1).

28285628117 is an equidigital number, since it uses as much as digits as its factorization.

28285628117 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 860160, while the sum is 50.

The spelling of 28285628117 in words is "twenty-eight billion, two hundred eighty-five million, six hundred twenty-eight thousand, one hundred seventeen".