28443473 has 2 divisors, whose sum is σ = 28443474. Its totient is φ = 28443472.

The previous prime is 28443469. The next prime is 28443497. The reversal of 28443473 is 37434482.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 25120144 + 3323329 = 5012^2 + 1823^2 .

It is a cyclic number.

It is not a de Polignac number, because 28443473 - 2² = 28443469 is a prime.

It is not a weakly prime, because it can be changed into another prime (28443073) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14221736 + 14221737.

It is an arithmetic number, because the mean of its divisors is an integer number (14221737).

Almost surely, 2^28443473 is an apocalyptic number.

It is an amenable number.

28443473 is a deficient number, since it is larger than the sum of its proper divisors (1).

28443473 is an equidigital number, since it uses as much as digits as its factorization.

28443473 is an evil number, because the sum of its binary digits is even.

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

The square root of 28443473 is about 5333.2422596391. The cubic root of 28443473 is about 305.2536562258.

The spelling of 28443473 in words is "twenty-eight million, four hundred forty-three thousand, four hundred seventy-three".