28113305 has 8 divisors (see below), whose sum is σ = 36802944. Its totient is φ = 20446000.

The previous prime is 28113289. The next prime is 28113307. The reversal of 28113305 is 50331182.

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

It is not a de Polignac number, because 28113305 - 2⁴ = 28113289 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28113307) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 255521 + ... + 255630.

It is an arithmetic number, because the mean of its divisors is an integer number (4600368).

Almost surely, 2^28113305 is an apocalyptic number.

It is an amenable number.

28113305 is a deficient number, since it is larger than the sum of its proper divisors (8689639).

28113305 is a wasteful number, since it uses less digits than its factorization.

28113305 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 511167.

The product of its (nonzero) digits is 720, while the sum is 23.

The square root of 28113305 is about 5302.1981290782. The cubic root of 28113305 is about 304.0679420223.

Adding to 28113305 its reverse (50331182), we get a palindrome (78444487).

It can be divided in two parts, 2811 and 3305, that added together give a palindrome (6116).

The spelling of 28113305 in words is "twenty-eight million, one hundred thirteen thousand, three hundred five".