28302817 has 8 divisors (see below), whose sum is σ = 29168192. Its totient is φ = 27442800.

The previous prime is 28302809. The next prime is 28302821. The reversal of 28302817 is 71820382.

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 28302817 - 2³ = 28302809 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28302847) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11092 + ... + 13402.

It is an arithmetic number, because the mean of its divisors is an integer number (3646024).

Almost surely, 2^28302817 is an apocalyptic number.

It is an amenable number.

28302817 is a deficient number, since it is larger than the sum of its proper divisors (865375).

28302817 is a wasteful number, since it uses less digits than its factorization.

28302817 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2679.

The product of its (nonzero) digits is 5376, while the sum is 31.

The square root of 28302817 is about 5320.0391915850. The cubic root of 28302817 is about 304.7496539273.

The spelling of 28302817 in words is "twenty-eight million, three hundred two thousand, eight hundred seventeen".