28086433 has 2 divisors, whose sum is σ = 28086434. Its totient is φ = 28086432.

The previous prime is 28086391. The next prime is 28086451. The reversal of 28086433 is 33468082.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 28058209 + 28224 = 5297^2 + 168^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28086433 is a prime.

It is not a weakly prime, because it can be changed into another prime (28086463) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14043216 + 14043217.

It is an arithmetic number, because the mean of its divisors is an integer number (14043217).

Almost surely, 2^28086433 is an apocalyptic number.

It is an amenable number.

28086433 is a deficient number, since it is larger than the sum of its proper divisors (1).

28086433 is an equidigital number, since it uses as much as digits as its factorization.

28086433 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 27648, while the sum is 34.

The square root of 28086433 is about 5299.6634798825. The cubic root of 28086433 is about 303.9710303939.

The spelling of 28086433 in words is "twenty-eight million, eighty-six thousand, four hundred thirty-three".