28353205 has 4 divisors (see below), whose sum is σ = 34023852. Its totient is φ = 22682560.

The previous prime is 28353167. The next prime is 28353233. The reversal of 28353205 is 50235382.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 50235382 = 2 ⋅25117691.

It can be written as a sum of positive squares in 2 ways, for example, as 21911761 + 6441444 = 4681^2 + 2538^2 .

It is not a de Polignac number, because 28353205 - 2⁷ = 28353077 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2835316 + ... + 2835325.

It is an arithmetic number, because the mean of its divisors is an integer number (8505963).

Almost surely, 2^28353205 is an apocalyptic number.

It is an amenable number.

28353205 is a deficient number, since it is larger than the sum of its proper divisors (5670647).

28353205 is an equidigital number, since it uses as much as digits as its factorization.

28353205 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5670646.

The product of its (nonzero) digits is 7200, while the sum is 28.

The square root of 28353205 is about 5324.7727651046. The cubic root of 28353205 is about 304.9303970888.

Adding to 28353205 its reverse (50235382), we get a palindrome (78588587).

The spelling of 28353205 in words is "twenty-eight million, three hundred fifty-three thousand, two hundred five".