28287334249 has 2 divisors, whose sum is σ = 28287334250. Its totient is φ = 28287334248.

The previous prime is 28287334247. The next prime is 28287334253. The reversal of 28287334249 is 94243378282.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 28262653225 + 24681024 = 168115^2 + 4968^2 .

It is a cyclic number.

It is not a de Polignac number, because 28287334249 - 2¹ = 28287334247 is a prime.

It is a super-3 number, since 3×28287334249³ (a number of 32 digits) contains 333 as substring.

Together with 28287334247, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 28287334196 and 28287334205.

It is not a weakly prime, because it can be changed into another prime (28287334241) 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 as a sum of consecutive naturals, namely, 14143667124 + 14143667125.

It is an arithmetic number, because the mean of its divisors is an integer number (14143667125).

Almost surely, 2^28287334249 is an apocalyptic number.

It is an amenable number.

28287334249 is a deficient number, since it is larger than the sum of its proper divisors (1).

28287334249 is an equidigital number, since it uses as much as digits as its factorization.

28287334249 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4644864, while the sum is 52.

The spelling of 28287334249 in words is "twenty-eight billion, two hundred eighty-seven million, three hundred thirty-four thousand, two hundred forty-nine".