28303943 has 2 divisors, whose sum is σ = 28303944. Its totient is φ = 28303942.

The previous prime is 28303903. The next prime is 28303973. The reversal of 28303943 is 34930382.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 28303943 - 2⁶ = 28303879 is a prime.

It is a super-2 number, since 2×28303943² = 1602226378694498, which contains 22 as substring.

It is a Chen prime.

It is equal to p_1759208 and since 28303943 and 1759208 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28303903) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14151971 + 14151972.

It is an arithmetic number, because the mean of its divisors is an integer number (14151972).

Almost surely, 2^28303943 is an apocalyptic number.

28303943 is a deficient number, since it is larger than the sum of its proper divisors (1).

28303943 is an equidigital number, since it uses as much as digits as its factorization.

28303943 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 15552, while the sum is 32.

The square root of 28303943 is about 5320.1450168205. The cubic root of 28303943 is about 304.7536952630.

The spelling of 28303943 in words is "twenty-eight million, three hundred three thousand, nine hundred forty-three".