28382615 has 4 divisors (see below), whose sum is σ = 34059144. Its totient is φ = 22706088.

The previous prime is 28382611. The next prime is 28382633. The reversal of 28382615 is 51628382.

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 28382615 - 2² = 28382611 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 (28382611) 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 3 ways as a sum of consecutive naturals, for example, 2838257 + ... + 2838266.

It is an arithmetic number, because the mean of its divisors is an integer number (8514786).

Almost surely, 2^28382615 is an apocalyptic number.

28382615 is a deficient number, since it is larger than the sum of its proper divisors (5676529).

28382615 is an equidigital number, since it uses as much as digits as its factorization.

28382615 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5676528.

The product of its digits is 23040, while the sum is 35.

The square root of 28382615 is about 5327.5336695323. The cubic root of 28382615 is about 305.0357926283.

The spelling of 28382615 in words is "twenty-eight million, three hundred eighty-two thousand, six hundred fifteen".