28305082 has 8 divisors (see below), whose sum is σ = 45723636. Its totient is φ = 13063872.

The previous prime is 28305071. The next prime is 28305097. The reversal of 28305082 is 28050382.

It can be written as a sum of positive squares in 2 ways, for example, as 25411681 + 2893401 = 5041^2 + 1701^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 28305082.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 544303 + ... + 544354.

Almost surely, 2^28305082 is an apocalyptic number.

28305082 is a deficient number, since it is larger than the sum of its proper divisors (17418554).

28305082 is a wasteful number, since it uses less digits than its factorization.

28305082 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1088672.

The product of its (nonzero) digits is 3840, while the sum is 28.

The square root of 28305082 is about 5320.2520616978. The cubic root of 28305082 is about 304.7577831482.

The spelling of 28305082 in words is "twenty-eight million, three hundred five thousand, eighty-two".