643331082 has 32 divisors (see below), whose sum is σ = 1319923584. Its totient is φ = 208915200.

The previous prime is 643331081. The next prime is 643331093. The reversal of 643331082 is 280133346.

It is not an unprimeable number, because it can be changed into a prime (643331081) 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, 229107 + ... + 231897.

It is an arithmetic number, because the mean of its divisors is an integer number (41247612).

Almost surely, 2^643331082 is an apocalyptic number.

643331082 is an abundant number, since it is smaller than the sum of its proper divisors (676592502).

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

643331082 is a wasteful number, since it uses less digits than its factorization.

643331082 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3774.

The product of its (nonzero) digits is 10368, while the sum is 30.

The square root of 643331082 is about 25363.9721258323. The cubic root of 643331082 is about 863.2664142496.

The spelling of 643331082 in words is "six hundred forty-three million, three hundred thirty-one thousand, eighty-two".