28250017 has 4 divisors (see below), whose sum is σ = 29736880. Its totient is φ = 26763156.

The previous prime is 28249999. The next prime is 28250023. The reversal of 28250017 is 71005282.

28250017 is nontrivially palindromic in base 16.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 28250017 - 2¹¹ = 28247969 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 28249973 and 28250000.

It is not an unprimeable number, because it can be changed into a prime (28250087) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 743403 + ... + 743440.

It is an arithmetic number, because the mean of its divisors is an integer number (7434220).

Almost surely, 2^28250017 is an apocalyptic number.

It is an amenable number.

28250017 is a deficient number, since it is larger than the sum of its proper divisors (1486863).

28250017 is a wasteful number, since it uses less digits than its factorization.

28250017 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1486862.

The product of its (nonzero) digits is 1120, while the sum is 25.

The square root of 28250017 is about 5315.0745055926. The cubic root of 28250017 is about 304.5600285377.

Adding to 28250017 its reverse (71005282), we get a palindrome (99255299).

The spelling of 28250017 in words is "twenty-eight million, two hundred fifty thousand, seventeen".