28330769 has 2 divisors, whose sum is σ = 28330770. Its totient is φ = 28330768.

The previous prime is 28330741. The next prime is 28330777. The reversal of 28330769 is 96703382.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 18490000 + 9840769 = 4300^2 + 3137^2 .

It is a cyclic number.

It is not a de Polignac number, because 28330769 - 2²⁰ = 27282193 is a prime.

It is a super-2 number, since 2×28330769² = 1605264944262722, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (28330739) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14165384 + 14165385.

It is an arithmetic number, because the mean of its divisors is an integer number (14165385).

Almost surely, 2^28330769 is an apocalyptic number.

It is an amenable number.

28330769 is a deficient number, since it is larger than the sum of its proper divisors (1).

28330769 is an equidigital number, since it uses as much as digits as its factorization.

28330769 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 54432, while the sum is 38.

The square root of 28330769 is about 5322.6655915998. The cubic root of 28330769 is about 304.8499449997.

The spelling of 28330769 in words is "twenty-eight million, three hundred thirty thousand, seven hundred sixty-nine".