643382230 has 16 divisors (see below), whose sum is σ = 1158454080. Its totient is φ = 257271552.

The previous prime is 643382227. The next prime is 643382239. The reversal of 643382230 is 32283346.

It is a junction number, because it is equal to n+sod(n) for n = 643382192 and 643382201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (643382239) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 30982 + ... + 47398.

It is an arithmetic number, because the mean of its divisors is an integer number (72403380).

Almost surely, 2^643382230 is an apocalyptic number.

643382230 is a deficient number, since it is larger than the sum of its proper divisors (515071850).

643382230 is a wasteful number, since it uses less digits than its factorization.

643382230 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20343.

The product of its (nonzero) digits is 20736, while the sum is 31.

The square root of 643382230 is about 25364.9803863516. The cubic root of 643382230 is about 863.2892916252.

The spelling of 643382230 in words is "six hundred forty-three million, three hundred eighty-two thousand, two hundred thirty".