28366533 has 12 divisors (see below), whose sum is σ = 44125900. Its totient is φ = 17456256.

The previous prime is 28366517. The next prime is 28366573. The reversal of 28366533 is 33566382.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 5008644 + 23357889 = 2238^2 + 4833^2 .

It is not a de Polignac number, because 28366533 - 2⁴ = 28366517 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28366573) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 121108 + ... + 121341.

Almost surely, 2^28366533 is an apocalyptic number.

It is an amenable number.

28366533 is a deficient number, since it is larger than the sum of its proper divisors (15759367).

28366533 is a wasteful number, since it uses less digits than its factorization.

28366533 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 242468 (or 242465 counting only the distinct ones).

The product of its digits is 77760, while the sum is 36.

The square root of 28366533 is about 5326.0241268699. The cubic root of 28366533 is about 304.9781691801.

The spelling of 28366533 in words is "twenty-eight million, three hundred sixty-six thousand, five hundred thirty-three".