28080217 has 8 divisors (see below), whose sum is σ = 31965120. Its totient is φ = 24417360.

The previous prime is 28080211. The next prime is 28080229. The reversal of 28080217 is 71208082.

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

It is a de Polignac number, because none of the positive numbers 2^k-28080217 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28080211) 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, 55242 + ... + 55747.

It is an arithmetic number, because the mean of its divisors is an integer number (3995640).

Almost surely, 2^28080217 is an apocalyptic number.

It is an amenable number.

28080217 is a deficient number, since it is larger than the sum of its proper divisors (3884903).

28080217 is a wasteful number, since it uses less digits than its factorization.

28080217 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 111023.

The product of its (nonzero) digits is 1792, while the sum is 28.

The square root of 28080217 is about 5299.0769951002. The cubic root of 28080217 is about 303.9486041055.

Adding to 28080217 its reverse (71208082), we get a palindrome (99288299).

The spelling of 28080217 in words is "twenty-eight million, eighty thousand, two hundred seventeen".