643386348 has 48 divisors (see below), whose sum is σ = 1819681920. Its totient is φ = 194965200.

The previous prime is 643386329. The next prime is 643386389. The reversal of 643386348 is 843683346.

643386348 is a `hidden beast` number, since 6 + 4 + 3 + 3 + 8 + 634 + 8 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 269598 + ... + 271973.

It is an arithmetic number, because the mean of its divisors is an integer number (37910040).

Almost surely, 2^643386348 is an apocalyptic number.

It is an amenable number.

643386348 is an abundant number, since it is smaller than the sum of its proper divisors (1176295572).

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

643386348 is a wasteful number, since it uses less digits than its factorization.

643386348 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 541595 (or 541587 counting only the distinct ones).

The product of its digits is 995328, while the sum is 45.

The square root of 643386348 is about 25365.0615611317. The cubic root of 643386348 is about 863.2911334633.

The spelling of 643386348 in words is "six hundred forty-three million, three hundred eighty-six thousand, three hundred forty-eight".