28303075 has 6 divisors (see below), whose sum is σ = 35095844. Its totient is φ = 22642440.

The previous prime is 28303057. The next prime is 28303081. The reversal of 28303075 is 57030382.

It is not a de Polignac number, because 28303075 - 2¹¹ = 28301027 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 566037 + ... + 566086.

Almost surely, 2^28303075 is an apocalyptic number.

28303075 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

28303075 is a deficient number, since it is larger than the sum of its proper divisors (6792769).

28303075 is a wasteful number, since it uses less digits than its factorization.

28303075 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1132133 (or 1132128 counting only the distinct ones).

The product of its (nonzero) digits is 5040, while the sum is 28.

The square root of 28303075 is about 5320.0634394714. The cubic root of 28303075 is about 304.7505799266.

The spelling of 28303075 in words is "twenty-eight million, three hundred three thousand, seventy-five".