428645573 has 2 divisors, whose sum is σ = 428645574. Its totient is φ = 428645572.

The previous prime is 428645551. The next prime is 428645647. The reversal of 428645573 is 375546824.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 374151649 + 54493924 = 19343^2 + 7382^2 .

It is a cyclic number.

It is not a de Polignac number, because 428645573 - 2⁶ = 428645509 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (428648573) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 214322786 + 214322787.

It is an arithmetic number, because the mean of its divisors is an integer number (214322787).

Almost surely, 2^428645573 is an apocalyptic number.

It is an amenable number.

428645573 is a deficient number, since it is larger than the sum of its proper divisors (1).

428645573 is an equidigital number, since it uses as much as digits as its factorization.

428645573 is an evil number, because the sum of its binary digits is even.

The product of its digits is 806400, while the sum is 44.

The square root of 428645573 is about 20703.7574609055. The cubic root of 428645573 is about 753.9909171793.

The spelling of 428645573 in words is "four hundred twenty-eight million, six hundred forty-five thousand, five hundred seventy-three".