28285843 has 2 divisors, whose sum is σ = 28285844. Its totient is φ = 28285842.

The previous prime is 28285811. The next prime is 28285849. The reversal of 28285843 is 34858282.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 28285843 - 2⁵ = 28285811 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 28285796 and 28285805.

It is not a weakly prime, because it can be changed into another prime (28285849) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14142921 + 14142922.

It is an arithmetic number, because the mean of its divisors is an integer number (14142922).

Almost surely, 2^28285843 is an apocalyptic number.

28285843 is a deficient number, since it is larger than the sum of its proper divisors (1).

28285843 is an equidigital number, since it uses as much as digits as its factorization.

28285843 is an evil number, because the sum of its binary digits is even.

The product of its digits is 122880, while the sum is 40.

The square root of 28285843 is about 5318.4436633286. The cubic root of 28285843 is about 304.6887194148.

The spelling of 28285843 in words is "twenty-eight million, two hundred eighty-five thousand, eight hundred forty-three".