28330307 has 8 divisors (see below), whose sum is σ = 28851984. Its totient is φ = 27813088.

The previous prime is 28330297. The next prime is 28330321. The reversal of 28330307 is 70303382.

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 28330307 - 2⁶ = 28330243 is a prime.

It is a super-3 number, since 3×28330307³ (a number of 23 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28330397) 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, 13373 + ... + 15345.

It is an arithmetic number, because the mean of its divisors is an integer number (3606498).

Almost surely, 2^28330307 is an apocalyptic number.

28330307 is a deficient number, since it is larger than the sum of its proper divisors (521677).

28330307 is a wasteful number, since it uses less digits than its factorization.

28330307 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2229.

The product of its (nonzero) digits is 3024, while the sum is 26.

The square root of 28330307 is about 5322.6221921155. The cubic root of 28330307 is about 304.8482878916.

Adding to 28330307 its reverse (70303382), we get a palindrome (98633689).

The spelling of 28330307 in words is "twenty-eight million, three hundred thirty thousand, three hundred seven".