28883133 has 12 divisors (see below), whose sum is σ = 41987868. Its totient is φ = 19131840.

The previous prime is 28883131. The next prime is 28883137. The reversal of 28883133 is 33138882.

It can be written as a sum of positive squares in 2 ways, for example, as 16793604 + 12089529 = 4098^2 + 3477^2 .

It is not a de Polignac number, because 28883133 - 2¹ = 28883131 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28883131) 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, 8808 + ... + 11633.

It is an arithmetic number, because the mean of its divisors is an integer number (3498989).

Almost surely, 2^28883133 is an apocalyptic number.

It is an amenable number.

28883133 is a deficient number, since it is larger than the sum of its proper divisors (13104735).

28883133 is a wasteful number, since it uses less digits than its factorization.

28883133 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20604 (or 20601 counting only the distinct ones).

The product of its digits is 27648, while the sum is 36.

The square root of 28883133 is about 5374.3030245791. The cubic root of 28883133 is about 306.8184229732.

The spelling of 28883133 in words is "twenty-eight million, eight hundred eighty-three thousand, one hundred thirty-three".