28086444497 has 2 divisors, whose sum is σ = 28086444498. Its totient is φ = 28086444496.

The previous prime is 28086444487. The next prime is 28086444517. The reversal of 28086444497 is 79444468082.

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., 22150666561 + 5935777936 = 148831^2 + 77044^2 .

It is a cyclic number.

It is not a de Polignac number, because 28086444497 - 2¹⁸ = 28086182353 is a prime.

It is not a weakly prime, because it can be changed into another prime (28086444437) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14043222248 + 14043222249.

It is an arithmetic number, because the mean of its divisors is an integer number (14043222249).

Almost surely, 2^28086444497 is an apocalyptic number.

It is an amenable number.

28086444497 is a deficient number, since it is larger than the sum of its proper divisors (1).

28086444497 is an equidigital number, since it uses as much as digits as its factorization.

28086444497 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12386304, while the sum is 56.

The spelling of 28086444497 in words is "twenty-eight billion, eighty-six million, four hundred forty-four thousand, four hundred ninety-seven".