28058030305 has 4 divisors (see below), whose sum is σ = 33669636372. Its totient is φ = 22446424240.

The previous prime is 28058030293. The next prime is 28058030309. The reversal of 28058030305 is 50303085082.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 22194146529 + 5863883776 = 148977^2 + 76576^2 .

It is not a de Polignac number, because 28058030305 - 2³¹ = 25910546657 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28058030309) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2805803026 + ... + 2805803035.

It is an arithmetic number, because the mean of its divisors is an integer number (8417409093).

Almost surely, 2^28058030305 is an apocalyptic number.

It is an amenable number.

28058030305 is a deficient number, since it is larger than the sum of its proper divisors (5611606067).

28058030305 is an equidigital number, since it uses as much as digits as its factorization.

28058030305 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5611606066.

The product of its (nonzero) digits is 28800, while the sum is 34.

The spelling of 28058030305 in words is "twenty-eight billion, fifty-eight million, thirty thousand, three hundred five".