28555843 has 2 divisors, whose sum is σ = 28555844. Its totient is φ = 28555842.

The previous prime is 28555829. The next prime is 28555871. The reversal of 28555843 is 34855582.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 28555843 - 2¹⁷ = 28424771 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 28555796 and 28555805.

It is not a weakly prime, because it can be changed into another prime (28555873) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14277921 + 14277922.

It is an arithmetic number, because the mean of its divisors is an integer number (14277922).

Almost surely, 2^28555843 is an apocalyptic number.

28555843 is a deficient number, since it is larger than the sum of its proper divisors (1).

28555843 is an equidigital number, since it uses as much as digits as its factorization.

28555843 is an evil number, because the sum of its binary digits is even.

The product of its digits is 192000, while the sum is 40.

The square root of 28555843 is about 5343.7667426638. The cubic root of 28555843 is about 305.6551107345.

The spelling of 28555843 in words is "twenty-eight million, five hundred fifty-five thousand, eight hundred forty-three".