428324643 has 6 divisors (see below), whose sum is σ = 618691164. Its totient is φ = 285549756.

The previous prime is 428324629. The next prime is 428324651. The reversal of 428324643 is 346423824.

428324643 is a `hidden beast` number, since 4 + 2 + 8 + 3 + 2 + 4 + 643 = 666.

It is not a de Polignac number, because 428324643 - 2⁴ = 428324627 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 428324598 and 428324607.

It is not an unprimeable number, because it can be changed into a prime (428324623) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 23795805 + ... + 23795822.

It is an arithmetic number, because the mean of its divisors is an integer number (103115194).

Almost surely, 2^428324643 is an apocalyptic number.

428324643 is a deficient number, since it is larger than the sum of its proper divisors (190366521).

428324643 is a wasteful number, since it uses less digits than its factorization.

428324643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47591633 (or 47591630 counting only the distinct ones).

The product of its digits is 110592, while the sum is 36.

The square root of 428324643 is about 20696.0054841508. The cubic root of 428324643 is about 753.8026974039.

The spelling of 428324643 in words is "four hundred twenty-eight million, three hundred twenty-four thousand, six hundred forty-three".