643435422 has 32 divisors (see below), whose sum is σ = 1488436992. Its totient is φ = 181622784.

The previous prime is 643435421. The next prime is 643435453. The reversal of 643435422 is 224534346.

643435422 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (643435421) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 88803 + ... + 95774.

It is an arithmetic number, because the mean of its divisors is an integer number (46513656).

Almost surely, 2^643435422 is an apocalyptic number.

643435422 is an abundant number, since it is smaller than the sum of its proper divisors (845001570).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

643435422 is a wasteful number, since it uses less digits than its factorization.

643435422 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 184672.

The product of its digits is 69120, while the sum is 33.

The square root of 643435422 is about 25366.0288969322. The cubic root of 643435422 is about 863.3130819510.

Adding to 643435422 its reverse (224534346), we get a palindrome (867969768).

The spelling of 643435422 in words is "six hundred forty-three million, four hundred thirty-five thousand, four hundred twenty-two".