28330777 has 2 divisors, whose sum is σ = 28330778. Its totient is φ = 28330776.

The previous prime is 28330769. The next prime is 28330787. The reversal of 28330777 is 77703382.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 24314761 + 4016016 = 4931^2 + 2004^2 .

It is a cyclic number.

It is not a de Polignac number, because 28330777 - 2³ = 28330769 is a prime.

It is not a weakly prime, because it can be changed into another prime (28330787) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14165388 + 14165389.

It is an arithmetic number, because the mean of its divisors is an integer number (14165389).

Almost surely, 2^28330777 is an apocalyptic number.

It is an amenable number.

28330777 is a deficient number, since it is larger than the sum of its proper divisors (1).

28330777 is an equidigital number, since it uses as much as digits as its factorization.

28330777 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 49392, while the sum is 37.

The square root of 28330777 is about 5322.6663431029. Note that the first 3 decimals coincide. The cubic root of 28330777 is about 304.8499736940.

The spelling of 28330777 in words is "twenty-eight million, three hundred thirty thousand, seven hundred seventy-seven".