28288105 has 8 divisors (see below), whose sum is σ = 34011072. Its totient is φ = 22586928.

The previous prime is 28288087. The next prime is 28288121. The reversal of 28288105 is 50188282.

It is a happy number.

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 28288105 - 2¹³ = 28279913 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, 2437 + ... + 7906.

It is an arithmetic number, because the mean of its divisors is an integer number (4251384).

Almost surely, 2^28288105 is an apocalyptic number.

It is an amenable number.

28288105 is a deficient number, since it is larger than the sum of its proper divisors (5722967).

28288105 is a wasteful number, since it uses less digits than its factorization.

28288105 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10895.

The product of its (nonzero) digits is 10240, while the sum is 34.

The square root of 28288105 is about 5318.6563152736. The cubic root of 28288105 is about 304.6968411162.

The spelling of 28288105 in words is "twenty-eight million, two hundred eighty-eight thousand, one hundred five".