28331105 has 8 divisors (see below), whose sum is σ = 37088064. Its totient is φ = 20604400.

The previous prime is 28331089. The next prime is 28331113. The reversal of 28331105 is 50113382.

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

It is not a de Polignac number, because 28331105 - 2⁴ = 28331089 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 257501 + ... + 257610.

It is an arithmetic number, because the mean of its divisors is an integer number (4636008).

Almost surely, 2^28331105 is an apocalyptic number.

It is an amenable number.

28331105 is a deficient number, since it is larger than the sum of its proper divisors (8756959).

28331105 is a wasteful number, since it uses less digits than its factorization.

28331105 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 515127.

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

The square root of 28331105 is about 5322.6971546388. The cubic root of 28331105 is about 304.8511501579.

Adding to 28331105 its reverse (50113382), we get a palindrome (78444487).

It can be divided in two parts, 28 and 331105, that added together give a palindrome (331133).

The spelling of 28331105 in words is "twenty-eight million, three hundred thirty-one thousand, one hundred five".