28665107 has 8 divisors (see below), whose sum is σ = 29981184. Its totient is φ = 27354888.

The previous prime is 28665101. The next prime is 28665139. The reversal of 28665107 is 70156682.

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

It is a cyclic number.

It is not a de Polignac number, because 28665107 - 2⁸ = 28664851 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28665101) 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 7 ways as a sum of consecutive naturals, for example, 10838 + ... + 13220.

It is an arithmetic number, because the mean of its divisors is an integer number (3747648).

Almost surely, 2^28665107 is an apocalyptic number.

28665107 is a deficient number, since it is larger than the sum of its proper divisors (1316077).

28665107 is a wasteful number, since it uses less digits than its factorization.

28665107 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2929.

The product of its (nonzero) digits is 20160, while the sum is 35.

The square root of 28665107 is about 5353.9804818471. The cubic root of 28665107 is about 306.0444600556.

The spelling of 28665107 in words is "twenty-eight million, six hundred sixty-five thousand, one hundred seven".