28245205 has 8 divisors (see below), whose sum is σ = 33923232. Its totient is φ = 22576848.

The previous prime is 28245199. The next prime is 28245227. The reversal of 28245205 is 50254282.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 28245205 - 2⁹ = 28244693 is a prime.

It is a super-3 number, since 3×28245205³ (a number of 23 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8514 + ... + 11356.

It is an arithmetic number, because the mean of its divisors is an integer number (4240404).

Almost surely, 2^28245205 is an apocalyptic number.

It is an amenable number.

28245205 is a deficient number, since it is larger than the sum of its proper divisors (5678027).

28245205 is a wasteful number, since it uses less digits than its factorization.

28245205 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4835.

The product of its (nonzero) digits is 6400, while the sum is 28.

The square root of 28245205 is about 5314.6218115685. The cubic root of 28245205 is about 304.5427350250.

Adding to 28245205 its reverse (50254282), we get a palindrome (78499487).

The spelling of 28245205 in words is "twenty-eight million, two hundred forty-five thousand, two hundred five".