28133659 has 2 divisors, whose sum is σ = 28133660. Its totient is φ = 28133658.

The previous prime is 28133641. The next prime is 28133671. The reversal of 28133659 is 95633182.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 28133659 - 2¹¹ = 28131611 is a prime.

It is not a weakly prime, because it can be changed into another prime (28133629) 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 as a sum of consecutive naturals, namely, 14066829 + 14066830.

It is an arithmetic number, because the mean of its divisors is an integer number (14066830).

Almost surely, 2^28133659 is an apocalyptic number.

28133659 is a deficient number, since it is larger than the sum of its proper divisors (1).

28133659 is an equidigital number, since it uses as much as digits as its factorization.

28133659 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 38880, while the sum is 37.

The square root of 28133659 is about 5304.1171744221. The cubic root of 28133659 is about 304.1413059317.

The spelling of 28133659 in words is "twenty-eight million, one hundred thirty-three thousand, six hundred fifty-nine".