643303248 has 40 divisors (see below), whose sum is σ = 1899277248. Its totient is φ = 183800832.

The previous prime is 643303223. The next prime is 643303249. The reversal of 643303248 is 842303346.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (643303249) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 956961 + ... + 957632.

Almost surely, 2^643303248 is an apocalyptic number.

It is an amenable number.

643303248 is an abundant number, since it is smaller than the sum of its proper divisors (1255974000).

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

643303248 is a wasteful number, since it uses less digits than its factorization.

643303248 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1914611 (or 1914605 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 33.

The square root of 643303248 is about 25363.4234282362. The cubic root of 643303248 is about 863.2539642040.

The spelling of 643303248 in words is "six hundred forty-three million, three hundred three thousand, two hundred forty-eight".