643292382 has 16 divisors (see below), whose sum is σ = 1342523520. Its totient is φ = 205107672.

The previous prime is 643292333. The next prime is 643292401. The reversal of 643292382 is 283292346.

It is a self number, because there is not a number n which added to its sum of digits gives 643292382.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2330632 + ... + 2330907.

It is an arithmetic number, because the mean of its divisors is an integer number (83907720).

Almost surely, 2^643292382 is an apocalyptic number.

643292382 is an abundant number, since it is smaller than the sum of its proper divisors (699231138).

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

643292382 is a wasteful number, since it uses less digits than its factorization.

643292382 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4661567.

The product of its digits is 124416, while the sum is 39.

The square root of 643292382 is about 25363.2092212322. The cubic root of 643292382 is about 863.2491037848.

The spelling of 643292382 in words is "six hundred forty-three million, two hundred ninety-two thousand, three hundred eighty-two".