28303093 has 32 divisors (see below), whose sum is σ = 36700160. Its totient is φ = 21228480.

The previous prime is 28303091. The next prime is 28303109. The reversal of 28303093 is 39030382.

It is a happy number.

It is not a de Polignac number, because 28303093 - 2¹ = 28303091 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28303091) 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 31 ways as a sum of consecutive naturals, for example, 222796 + ... + 222922.

It is an arithmetic number, because the mean of its divisors is an integer number (1146880).

Almost surely, 2^28303093 is an apocalyptic number.

It is an amenable number.

28303093 is a deficient number, since it is larger than the sum of its proper divisors (8397067).

28303093 is a wasteful number, since it uses less digits than its factorization.

28303093 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 257.

The product of its (nonzero) digits is 3888, while the sum is 28.

The square root of 28303093 is about 5320.0651311803. The cubic root of 28303093 is about 304.7506445310.

The spelling of 28303093 in words is "twenty-eight million, three hundred three thousand, ninety-three".