28133029 has 4 divisors (see below), whose sum is σ = 28609920. Its totient is φ = 27656140.

The previous prime is 28133023. The next prime is 28133033. The reversal of 28133029 is 92033182.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 28133029 - 2⁵ = 28132997 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 28132988 and 28133006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28133023) 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 3 ways as a sum of consecutive naturals, for example, 238357 + ... + 238474.

It is an arithmetic number, because the mean of its divisors is an integer number (7152480).

Almost surely, 2^28133029 is an apocalyptic number.

It is an amenable number.

28133029 is a deficient number, since it is larger than the sum of its proper divisors (476891).

28133029 is an equidigital number, since it uses as much as digits as its factorization.

28133029 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 476890.

The product of its (nonzero) digits is 2592, while the sum is 28.

The square root of 28133029 is about 5304.0577862614. The cubic root of 28133029 is about 304.1390356919.

The spelling of 28133029 in words is "twenty-eight million, one hundred thirty-three thousand, twenty-nine".