28805369 has 2 divisors, whose sum is σ = 28805370. Its totient is φ = 28805368.

The previous prime is 28805353. The next prime is 28805383. The reversal of 28805369 is 96350882.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 16096144 + 12709225 = 4012^2 + 3565^2 .

It is a cyclic number.

It is not a de Polignac number, because 28805369 - 2⁴ = 28805353 is a prime.

It is a super-2 number, since 2×28805369² = 1659498566452322, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (28805389) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14402684 + 14402685.

It is an arithmetic number, because the mean of its divisors is an integer number (14402685).

Almost surely, 2^28805369 is an apocalyptic number.

It is an amenable number.

28805369 is a deficient number, since it is larger than the sum of its proper divisors (1).

28805369 is an equidigital number, since it uses as much as digits as its factorization.

28805369 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 103680, while the sum is 41.

The square root of 28805369 is about 5367.0633497286. The cubic root of 28805369 is about 306.5428195301.

The spelling of 28805369 in words is "twenty-eight million, eight hundred five thousand, three hundred sixty-nine".