28917443 has 2 divisors, whose sum is σ = 28917444. Its totient is φ = 28917442.

The previous prime is 28917439. The next prime is 28917467. The reversal of 28917443 is 34471982.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 28917443 - 2² = 28917439 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 28917397 and 28917406.

It is not a weakly prime, because it can be changed into another prime (28917403) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14458721 + 14458722.

It is an arithmetic number, because the mean of its divisors is an integer number (14458722).

Almost surely, 2^28917443 is an apocalyptic number.

28917443 is a deficient number, since it is larger than the sum of its proper divisors (1).

28917443 is an equidigital number, since it uses as much as digits as its factorization.

28917443 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 48384, while the sum is 38.

The square root of 28917443 is about 5377.4941190112. The cubic root of 28917443 is about 306.9398637989.

The spelling of 28917443 in words is "twenty-eight million, nine hundred seventeen thousand, four hundred forty-three".