28330015 has 16 divisors (see below), whose sum is σ = 38979648. Its totient is φ = 19362816.

The previous prime is 28330009. The next prime is 28330019. The reversal of 28330015 is 51003382.

It is a cyclic number.

It is not a de Polignac number, because 28330015 - 2²³ = 19941407 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28330019) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11209 + ... + 13501.

It is an arithmetic number, because the mean of its divisors is an integer number (2436228).

Almost surely, 2^28330015 is an apocalyptic number.

28330015 is a deficient number, since it is larger than the sum of its proper divisors (10649633).

28330015 is a wasteful number, since it uses less digits than its factorization.

28330015 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2658.

The product of its (nonzero) digits is 720, while the sum is 22.

The square root of 28330015 is about 5322.5947619559. The cubic root of 28330015 is about 304.8472405326.

Adding to 28330015 its reverse (51003382), we get a palindrome (79333397).

The spelling of 28330015 in words is "twenty-eight million, three hundred thirty thousand, fifteen".