28933469 has 2 divisors, whose sum is σ = 28933470. Its totient is φ = 28933468.

The previous prime is 28933433. The next prime is 28933483. The reversal of 28933469 is 96433982.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20884900 + 8048569 = 4570^2 + 2837^2 .

It is a cyclic number.

It is not a de Polignac number, because 28933469 - 2²⁰ = 27884893 is a prime.

It is a super-2 number, since 2×28933469² = 1674291256747922, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28933169) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14466734 + 14466735.

It is an arithmetic number, because the mean of its divisors is an integer number (14466735).

Almost surely, 2^28933469 is an apocalyptic number.

It is an amenable number.

28933469 is a deficient number, since it is larger than the sum of its proper divisors (1).

28933469 is an equidigital number, since it uses as much as digits as its factorization.

28933469 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 279936, while the sum is 44.

The square root of 28933469 is about 5378.9840118744. The cubic root of 28933469 is about 306.9965551856.

The spelling of 28933469 in words is "twenty-eight million, nine hundred thirty-three thousand, four hundred sixty-nine".