28303045 has 16 divisors (see below), whose sum is σ = 36091440. Its totient is φ = 21233664.

The previous prime is 28303021. The next prime is 28303057. The reversal of 28303045 is 54030382.

It can be written as a sum of positive squares in 8 ways, for example, as 1117249 + 27185796 = 1057^2 + 5214^2 .

It is a 9-Lehmer number, since φ(28303045) divides (28303045-1)⁹.

It is a cyclic number.

It is not a de Polignac number, because 28303045 - 2⁵ = 28303013 is a prime.

It is a congruent number.

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 15 ways as a sum of consecutive naturals, for example, 36421 + ... + 37189.

It is an arithmetic number, because the mean of its divisors is an integer number (2255715).

Almost surely, 2^28303045 is an apocalyptic number.

It is an amenable number.

28303045 is a deficient number, since it is larger than the sum of its proper divisors (7788395).

28303045 is a wasteful number, since it uses less digits than its factorization.

28303045 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1224.

The product of its (nonzero) digits is 2880, while the sum is 25.

The square root of 28303045 is about 5320.0606199554. The cubic root of 28303045 is about 304.7504722526.

The spelling of 28303045 in words is "twenty-eight million, three hundred three thousand, forty-five".