643038234 has 8 divisors (see below), whose sum is σ = 1286076480. Its totient is φ = 214346076.

The previous prime is 643038191. The next prime is 643038247. The reversal of 643038234 is 432830346.

It is a sphenic number, since it is the product of 3 distinct primes.

643038234 is an admirable number.

It is a junction number, because it is equal to n+sod(n) for n = 643038195 and 643038204.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 53586514 + ... + 53586525.

It is an arithmetic number, because the mean of its divisors is an integer number (160759560).

Almost surely, 2^643038234 is an apocalyptic number.

643038234 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

643038234 is a wasteful number, since it uses less digits than its factorization.

643038234 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 107173044.

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

The square root of 643038234 is about 25358.1985558911. The cubic root of 643038234 is about 863.1354064273.

The spelling of 643038234 in words is "six hundred forty-three million, thirty-eight thousand, two hundred thirty-four".