28056943 has 2 divisors, whose sum is σ = 28056944. Its totient is φ = 28056942.

The previous prime is 28056907. The next prime is 28056961. The reversal of 28056943 is 34965082.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 28056943 - 2¹³ = 28048751 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28056143) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14028471 + 14028472.

It is an arithmetic number, because the mean of its divisors is an integer number (14028472).

Almost surely, 2^28056943 is an apocalyptic number.

28056943 is a deficient number, since it is larger than the sum of its proper divisors (1).

28056943 is an equidigital number, since it uses as much as digits as its factorization.

28056943 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 51840, while the sum is 37.

The square root of 28056943 is about 5296.8804970473. The cubic root of 28056943 is about 303.8646059994.

The spelling of 28056943 in words is "twenty-eight million, fifty-six thousand, nine hundred forty-three".