28250315 has 4 divisors (see below), whose sum is σ = 33900384. Its totient is φ = 22600248.

The previous prime is 28250303. The next prime is 28250323. The reversal of 28250315 is 51305282.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 28250315 - 2⁸ = 28250059 is a prime.

It is a Duffinian number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 2825027 + ... + 2825036.

It is an arithmetic number, because the mean of its divisors is an integer number (8475096).

Almost surely, 2^28250315 is an apocalyptic number.

28250315 is a deficient number, since it is larger than the sum of its proper divisors (5650069).

28250315 is an equidigital number, since it uses as much as digits as its factorization.

28250315 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5650068.

The product of its (nonzero) digits is 2400, while the sum is 26.

The square root of 28250315 is about 5315.1025389921. The cubic root of 28250315 is about 304.5610994346.

Adding to 28250315 its reverse (51305282), we get a palindrome (79555597).

The spelling of 28250315 in words is "twenty-eight million, two hundred fifty thousand, three hundred fifteen".