28303345 has 16 divisors (see below), whose sum is σ = 38953728. Its totient is φ = 19339200.

The previous prime is 28303343. The next prime is 28303357. The reversal of 28303345 is 54330382.

It is not a de Polignac number, because 28303345 - 2¹ = 28303343 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28303343) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9820 + ... + 12370.

It is an arithmetic number, because the mean of its divisors is an integer number (2434608).

Almost surely, 2^28303345 is an apocalyptic number.

It is an amenable number.

28303345 is a deficient number, since it is larger than the sum of its proper divisors (10650383).

28303345 is a wasteful number, since it uses less digits than its factorization.

28303345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2880.

The product of its (nonzero) digits is 8640, while the sum is 28.

The square root of 28303345 is about 5320.0888150481. The cubic root of 28303345 is about 304.7515489897.

The spelling of 28303345 in words is "twenty-eight million, three hundred three thousand, three hundred forty-five".