28306421358473 has 2 divisors, whose sum is σ = 28306421358474. Its totient is φ = 28306421358472.

The previous prime is 28306421358437. The next prime is 28306421358539. The reversal of 28306421358473 is 37485312460382.

Together with previous prime (28306421358437) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 17284041278464 + 11022380080009 = 4157408^2 + 3319997^2 .

It is a cyclic number.

It is not a de Polignac number, because 28306421358473 - 2³⁸ = 28031543451529 is a prime.

It is not a weakly prime, because it can be changed into another prime (28306421358073) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14153210679236 + 14153210679237.

It is an arithmetic number, because the mean of its divisors is an integer number (14153210679237).

Almost surely, 2^{28306421358473} is an apocalyptic number.

It is an amenable number.

28306421358473 is a deficient number, since it is larger than the sum of its proper divisors (1).

28306421358473 is an equidigital number, since it uses as much as digits as its factorization.

28306421358473 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 23224320, while the sum is 56.

The spelling of 28306421358473 in words is "twenty-eight trillion, three hundred six billion, four hundred twenty-one million, three hundred fifty-eight thousand, four hundred seventy-three".