643622082 has 16 divisors (see below), whose sum is σ = 1288262880. Its totient is φ = 214370912.

The previous prime is 643622081. The next prime is 643622099. The reversal of 643622082 is 280226346.

It is not an unprimeable number, because it can be changed into a prime (643622081) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 34107 + ... + 49502.

It is an arithmetic number, because the mean of its divisors is an integer number (80516430).

Almost surely, 2^643622082 is an apocalyptic number.

643622082 is an abundant number, since it is smaller than the sum of its proper divisors (644640798).

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

643622082 is a wasteful number, since it uses less digits than its factorization.

643622082 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84897.

The product of its (nonzero) digits is 27648, while the sum is 33.

The square root of 643622082 is about 25369.7079604792. The cubic root of 643622082 is about 863.3965559792.

The spelling of 643622082 in words is "six hundred forty-three million, six hundred twenty-two thousand, eighty-two".