28242743 has 2 divisors, whose sum is σ = 28242744. Its totient is φ = 28242742.

The previous prime is 28242719. The next prime is 28242761. The reversal of 28242743 is 34724282.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 28242743 - 2¹² = 28238647 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28242713) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14121371 + 14121372.

It is an arithmetic number, because the mean of its divisors is an integer number (14121372).

Almost surely, 2^28242743 is an apocalyptic number.

28242743 is a deficient number, since it is larger than the sum of its proper divisors (1).

28242743 is an equidigital number, since it uses as much as digits as its factorization.

28242743 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 21504, while the sum is 32.

The square root of 28242743 is about 5314.3901813849. The cubic root of 28242743 is about 304.5338862547.

The spelling of 28242743 in words is "twenty-eight million, two hundred forty-two thousand, seven hundred forty-three".