28806443 has 2 divisors, whose sum is σ = 28806444. Its totient is φ = 28806442.

The previous prime is 28806439. The next prime is 28806497. The reversal of 28806443 is 34460882.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 28806443 - 2² = 28806439 is a prime.

It is a super-2 number, since 2×28806443² = 1659622316624498, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (28826443) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14403221 + 14403222.

It is an arithmetic number, because the mean of its divisors is an integer number (14403222).

Almost surely, 2^28806443 is an apocalyptic number.

28806443 is a deficient number, since it is larger than the sum of its proper divisors (1).

28806443 is an equidigital number, since it uses as much as digits as its factorization.

28806443 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 36864, while the sum is 35.

The square root of 28806443 is about 5367.1634035121. The cubic root of 28806443 is about 306.5466292701.

The spelling of 28806443 in words is "twenty-eight million, eight hundred six thousand, four hundred forty-three".