28323305 has 16 divisors (see below), whose sum is σ = 35251200. Its totient is φ = 21823680.

The previous prime is 28323301. The next prime is 28323307. The reversal of 28323305 is 50332382.

28323305 = T₄₅ + T₄₆ + ... + T₅₅₃.

It is not a de Polignac number, because 28323305 - 2² = 28323301 is a prime.

It is a super-2 number, since 2×28323305² = 1604419212246050, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (28323301) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 55391 + ... + 55899.

It is an arithmetic number, because the mean of its divisors is an integer number (2203200).

Almost surely, 2^28323305 is an apocalyptic number.

It is an amenable number.

28323305 is a deficient number, since it is larger than the sum of its proper divisors (6927895).

28323305 is a wasteful number, since it uses less digits than its factorization.

28323305 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 904.

The product of its (nonzero) digits is 4320, while the sum is 26.

The square root of 28323305 is about 5321.9643929662. The cubic root of 28323305 is about 304.8231708136.

Adding to 28323305 its reverse (50332382), we get a palindrome (78655687).

The spelling of 28323305 in words is "twenty-eight million, three hundred twenty-three thousand, three hundred five".