643212848 has 40 divisors (see below), whose sum is σ = 1302544608. Its totient is φ = 307118592.

The previous prime is 643212841. The next prime is 643212863. The reversal of 643212848 is 848212346.

It is a super-2 number, since 2×643212848² = 827445535664542208, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (643212841) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 321740 + ... + 323732.

Almost surely, 2^643212848 is an apocalyptic number.

It is an amenable number.

643212848 is an abundant number, since it is smaller than the sum of its proper divisors (659331760).

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

643212848 is a wasteful number, since it uses less digits than its factorization.

643212848 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2901 (or 2895 counting only the distinct ones).

The product of its digits is 73728, while the sum is 38.

The square root of 643212848 is about 25361.6412718105. The cubic root of 643212848 is about 863.2135261398.

The spelling of 643212848 in words is "six hundred forty-three million, two hundred twelve thousand, eight hundred forty-eight".