28443469 has 2 divisors, whose sum is σ = 28443470. Its totient is φ = 28443468.

The previous prime is 28443439. The next prime is 28443473. The reversal of 28443469 is 96434482.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 24621444 + 3822025 = 4962^2 + 1955^2 .

It is a cyclic number.

It is not a de Polignac number, because 28443469 - 2⁹ = 28442957 is a prime.

It is a super-2 number, since 2×28443469² = 1618061857507922, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28443439) 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, 14221734 + 14221735.

It is an arithmetic number, because the mean of its divisors is an integer number (14221735).

Almost surely, 2^28443469 is an apocalyptic number.

It is an amenable number.

28443469 is a deficient number, since it is larger than the sum of its proper divisors (1).

28443469 is an equidigital number, since it uses as much as digits as its factorization.

28443469 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 165888, while the sum is 40.

The square root of 28443469 is about 5333.2418846326. The cubic root of 28443469 is about 305.2536419166.

The spelling of 28443469 in words is "twenty-eight million, four hundred forty-three thousand, four hundred sixty-nine".