28058305 has 16 divisors (see below), whose sum is σ = 37101888. Its totient is φ = 20200000.

The previous prime is 28058293. The next prime is 28058311. The reversal of 28058305 is 50385082.

It is not a de Polignac number, because 28058305 - 2¹¹ = 28056257 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3030 + ... + 8080.

It is an arithmetic number, because the mean of its divisors is an integer number (2318868).

Almost surely, 2^28058305 is an apocalyptic number.

It is an amenable number.

28058305 is a deficient number, since it is larger than the sum of its proper divisors (9043583).

28058305 is a wasteful number, since it uses less digits than its factorization.

28058305 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5168.

The product of its (nonzero) digits is 9600, while the sum is 31.

The square root of 28058305 is about 5297.0090617253. The cubic root of 28058305 is about 303.8695228679.

It can be divided in two parts, 280 and 58305, that added together give a palindrome (58585).

The spelling of 28058305 in words is "twenty-eight million, fifty-eight thousand, three hundred five".