28226087249 has 2 divisors, whose sum is σ = 28226087250. Its totient is φ = 28226087248.

The previous prime is 28226087213. The next prime is 28226087287. The reversal of 28226087249 is 94278062282.

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., 28112558224 + 113529025 = 167668^2 + 10655^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28226087249 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 28226087197 and 28226087206.

It is not a weakly prime, because it can be changed into another prime (28226087299) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14113043624 + 14113043625.

It is an arithmetic number, because the mean of its divisors is an integer number (14113043625).

Almost surely, 2^28226087249 is an apocalyptic number.

It is an amenable number.

28226087249 is a deficient number, since it is larger than the sum of its proper divisors (1).

28226087249 is an equidigital number, since it uses as much as digits as its factorization.

28226087249 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1548288, while the sum is 50.

The spelling of 28226087249 in words is "twenty-eight billion, two hundred twenty-six million, eighty-seven thousand, two hundred forty-nine".