28287581293 has 2 divisors, whose sum is σ = 28287581294. Its totient is φ = 28287581292.

The previous prime is 28287581243. The next prime is 28287581317. The reversal of 28287581293 is 39218578282.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 23943848644 + 4343732649 = 154738^2 + 65907^2 .

It is a cyclic number.

It is not a de Polignac number, because 28287581293 - 2⁹ = 28287580781 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28287581243) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14143790646 + 14143790647.

It is an arithmetic number, because the mean of its divisors is an integer number (14143790647).

Almost surely, 2^28287581293 is an apocalyptic number.

It is an amenable number.

28287581293 is a deficient number, since it is larger than the sum of its proper divisors (1).

28287581293 is an equidigital number, since it uses as much as digits as its factorization.

28287581293 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3870720, while the sum is 55.

The spelling of 28287581293 in words is "twenty-eight billion, two hundred eighty-seven million, five hundred eighty-one thousand, two hundred ninety-three".