428963643 has 12 divisors (see below), whose sum is σ = 620343360. Its totient is φ = 285639216.

The previous prime is 428963617. The next prime is 428963659. The reversal of 428963643 is 346369824.

428963643 is a `hidden beast` number, since 4 + 2 + 8 + 9 + 636 + 4 + 3 = 666.

It is not a de Polignac number, because 428963643 - 2⁸ = 428963387 is a prime.

It is not an unprimeable number, because it can be changed into a prime (428963603) 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 11 ways as a sum of consecutive naturals, for example, 19848 + ... + 35381.

It is an arithmetic number, because the mean of its divisors is an integer number (51695280).

Almost surely, 2^428963643 is an apocalyptic number.

428963643 is a deficient number, since it is larger than the sum of its proper divisors (191379717).

428963643 is a wasteful number, since it uses less digits than its factorization.

428963643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56098 (or 56095 counting only the distinct ones).

The product of its digits is 746496, while the sum is 45.

The square root of 428963643 is about 20711.4374923616. The cubic root of 428963643 is about 754.1773669425.

The spelling of 428963643 in words is "four hundred twenty-eight million, nine hundred sixty-three thousand, six hundred forty-three".