28050005 has 8 divisors (see below), whose sum is σ = 33696600. Its totient is φ = 22415616.

The previous prime is 28049999. The next prime is 28050007. The reversal of 28050005 is 50005082.

It can be written as a sum of positive squares in 4 ways, for example, as 192721 + 27857284 = 439^2 + 5278^2 .

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 28050005 - 2⁶ = 28049941 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28050007) 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, 3161 + ... + 8129.

It is an arithmetic number, because the mean of its divisors is an integer number (4212075).

Almost surely, 2^28050005 is an apocalyptic number.

It is an amenable number.

28050005 is a deficient number, since it is larger than the sum of its proper divisors (5646595).

28050005 is a wasteful number, since it uses less digits than its factorization.

28050005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6103.

The product of its (nonzero) digits is 400, while the sum is 20.

The square root of 28050005 is about 5296.2255427804. The cubic root of 28050005 is about 303.8395571023.

Adding to 28050005 its reverse (50005082), we get a palindrome (78055087).

The spelling of 28050005 in words is "twenty-eight million, fifty thousand, five".