28281303 has 12 divisors (see below), whose sum is σ = 41461368. Its totient is φ = 18572400.

The previous prime is 28281299. The next prime is 28281311. The reversal of 28281303 is 30318282.

28281303 is a `hidden beast` number, since 282 + 81 + 303 = 666.

It is not a de Polignac number, because 28281303 - 2² = 28281299 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28281343) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 22848 + ... + 24053.

It is an arithmetic number, because the mean of its divisors is an integer number (3455114).

Almost surely, 2^28281303 is an apocalyptic number.

28281303 is a deficient number, since it is larger than the sum of its proper divisors (13180065).

28281303 is a wasteful number, since it uses less digits than its factorization.

28281303 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46974 (or 46971 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 27.

The square root of 28281303 is about 5318.0168296086. The cubic root of 28281303 is about 304.6724172573.

Adding to 28281303 its reverse (30318282), we get a palindrome (58599585).

The spelling of 28281303 in words is "twenty-eight million, two hundred eighty-one thousand, three hundred three".