28311009443 has 2 divisors, whose sum is σ = 28311009444. Its totient is φ = 28311009442.

The previous prime is 28311009383. The next prime is 28311009481. The reversal of 28311009443 is 34490011382.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 28311009443 - 2⁸ = 28311009187 is a prime.

It is not a weakly prime, because it can be changed into another prime (28311003443) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14155504721 + 14155504722.

It is an arithmetic number, because the mean of its divisors is an integer number (14155504722).

Almost surely, 2^28311009443 is an apocalyptic number.

28311009443 is a deficient number, since it is larger than the sum of its proper divisors (1).

28311009443 is an equidigital number, since it uses as much as digits as its factorization.

28311009443 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 20736, while the sum is 35.

The spelling of 28311009443 in words is "twenty-eight billion, three hundred eleven million, nine thousand, four hundred forty-three".