28159433 has 2 divisors, whose sum is σ = 28159434. Its totient is φ = 28159432.

The previous prime is 28159421. The next prime is 28159441. The reversal of 28159433 is 33495182.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 27175369 + 984064 = 5213^2 + 992^2 .

It is a cyclic number.

It is not a de Polignac number, because 28159433 - 2²⁰ = 27110857 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 28159393 and 28159402.

It is not a weakly prime, because it can be changed into another prime (28119433) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14079716 + 14079717.

It is an arithmetic number, because the mean of its divisors is an integer number (14079717).

Almost surely, 2^28159433 is an apocalyptic number.

It is an amenable number.

28159433 is a deficient number, since it is larger than the sum of its proper divisors (1).

28159433 is an equidigital number, since it uses as much as digits as its factorization.

28159433 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 25920, while the sum is 35.

The square root of 28159433 is about 5306.5462402583. The cubic root of 28159433 is about 304.2341549210.

The spelling of 28159433 in words is "twenty-eight million, one hundred fifty-nine thousand, four hundred thirty-three".