28310005 has 8 divisors (see below), whose sum is σ = 34084512. Its totient is φ = 22573008.

The previous prime is 28309999. The next prime is 28310011. The reversal of 28310005 is 50001382.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (28309999) and next prime (28310011).

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 28310005 - 2⁷ = 28309877 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7687 + ... + 10756.

It is an arithmetic number, because the mean of its divisors is an integer number (4260564).

Almost surely, 2^28310005 is an apocalyptic number.

It is an amenable number.

28310005 is a deficient number, since it is larger than the sum of its proper divisors (5774507).

28310005 is a wasteful number, since it uses less digits than its factorization.

28310005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18755.

The product of its (nonzero) digits is 240, while the sum is 19.

The square root of 28310005 is about 5320.7147076309. The cubic root of 28310005 is about 304.7754505950.

Adding to 28310005 its reverse (50001382), we get a palindrome (78311387).

The spelling of 28310005 in words is "twenty-eight million, three hundred ten thousand, five".