28026133 has 4 divisors (see below), whose sum is σ = 28053900. Its totient is φ = 27998368.

The previous prime is 28026079. The next prime is 28026137. The reversal of 28026133 is 33162082.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 16144324 + 11881809 = 4018^2 + 3447^2 .

It is a cyclic number.

It is not a de Polignac number, because 28026133 - 2¹⁷ = 27895061 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 28026098 and 28026107.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28026137) 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, 12310 + ... + 14407.

It is an arithmetic number, because the mean of its divisors is an integer number (7013475).

Almost surely, 2^28026133 is an apocalyptic number.

It is an amenable number.

28026133 is a deficient number, since it is larger than the sum of its proper divisors (27767).

28026133 is a wasteful number, since it uses less digits than its factorization.

28026133 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27766.

The product of its (nonzero) digits is 1728, while the sum is 25.

The square root of 28026133 is about 5293.9713826200. The cubic root of 28026133 is about 303.7533382643.

The spelling of 28026133 in words is "twenty-eight million, twenty-six thousand, one hundred thirty-three".