28393803 has 12 divisors (see below), whose sum is σ = 41967640. Its totient is φ = 18488736.

The previous prime is 28393801. The next prime is 28393829. The reversal of 28393803 is 30839382.

It is not a de Polignac number, because 28393803 - 2¹ = 28393801 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28393801) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 36298 + ... + 37071.

Almost surely, 2^28393803 is an apocalyptic number.

28393803 is a deficient number, since it is larger than the sum of its proper divisors (13573837).

28393803 is a wasteful number, since it uses less digits than its factorization.

28393803 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73418 (or 73415 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 36.

The square root of 28393803 is about 5328.5835829046. The cubic root of 28393803 is about 305.0758675372.

The spelling of 28393803 in words is "twenty-eight million, three hundred ninety-three thousand, eight hundred three".