28948769 has 2 divisors, whose sum is σ = 28948770. Its totient is φ = 28948768.

The previous prime is 28948753. The next prime is 28948781. The reversal of 28948769 is 96784982.

28948769 is nontrivially palindromic in base 14.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 26388769 + 2560000 = 5137^2 + 1600^2 .

It is a cyclic number.

It is not a de Polignac number, because 28948769 - 2⁴ = 28948753 is a prime.

It is a super-2 number, since 2×28948769² = 1676062453230722, which contains 22 as substring.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 28948769.

It is not a weakly prime, because it can be changed into another prime (28948069) 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 as a sum of consecutive naturals, namely, 14474384 + 14474385.

It is an arithmetic number, because the mean of its divisors is an integer number (14474385).

Almost surely, 2^28948769 is an apocalyptic number.

It is an amenable number.

28948769 is a deficient number, since it is larger than the sum of its proper divisors (1).

28948769 is an equidigital number, since it uses as much as digits as its factorization.

28948769 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1741824, while the sum is 53.

The square root of 28948769 is about 5380.4060255709. The cubic root of 28948769 is about 307.0506588444.

The spelling of 28948769 in words is "twenty-eight million, nine hundred forty-eight thousand, seven hundred sixty-nine".