428666571 has 48 divisors (see below), whose sum is σ = 671571264. Its totient is φ = 262766592.

The previous prime is 428666569. The next prime is 428666599. The reversal of 428666571 is 175666824.

It is not a de Polignac number, because 428666571 - 2¹ = 428666569 is a prime.

It is not an unprimeable number, because it can be changed into a prime (428666471) 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 in 47 ways as a sum of consecutive naturals, for example, 742635 + ... + 743211.

It is an arithmetic number, because the mean of its divisors is an integer number (13991068).

Almost surely, 2^428666571 is an apocalyptic number.

428666571 is a deficient number, since it is larger than the sum of its proper divisors (242904693).

428666571 is a wasteful number, since it uses less digits than its factorization.

428666571 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 740 (or 737 counting only the distinct ones).

The product of its digits is 483840, while the sum is 45.

The square root of 428666571 is about 20704.2645607131. The cubic root of 428666571 is about 754.0032288604.

The spelling of 428666571 in words is "four hundred twenty-eight million, six hundred sixty-six thousand, five hundred seventy-one".