28347443 has 2 divisors, whose sum is σ = 28347444. Its totient is φ = 28347442.

The previous prime is 28347437. The next prime is 28347463. The reversal of 28347443 is 34474382.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 28347443 - 2⁴ = 28347427 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (28347463) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14173721 + 14173722.

It is an arithmetic number, because the mean of its divisors is an integer number (14173722).

Almost surely, 2^28347443 is an apocalyptic number.

28347443 is a deficient number, since it is larger than the sum of its proper divisors (1).

28347443 is an equidigital number, since it uses as much as digits as its factorization.

28347443 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 64512, while the sum is 35.

The square root of 28347443 is about 5324.2316816607. The cubic root of 28347443 is about 304.9097394832.

The spelling of 28347443 in words is "twenty-eight million, three hundred forty-seven thousand, four hundred forty-three".