28343205 has 24 divisors (see below), whose sum is σ = 53595360. Its totient is φ = 13741920.

The previous prime is 28343201. The next prime is 28343213. The reversal of 28343205 is 50234382.

It is not a de Polignac number, because 28343205 - 2² = 28343201 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28343201) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 28135 + ... + 29124.

It is an arithmetic number, because the mean of its divisors is an integer number (2233140).

Almost surely, 2^28343205 is an apocalyptic number.

It is an amenable number.

28343205 is a deficient number, since it is larger than the sum of its proper divisors (25252155).

28343205 is a wasteful number, since it uses less digits than its factorization.

28343205 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57281 (or 57278 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 27.

The square root of 28343205 is about 5323.8336750879. The cubic root of 28343205 is about 304.8945438519.

Adding to 28343205 its reverse (50234382), we get a palindrome (78577587).

The spelling of 28343205 in words is "twenty-eight million, three hundred forty-three thousand, two hundred five".