643395348 has 36 divisors (see below), whose sum is σ = 1629639648. Its totient is φ = 214032720.

The previous prime is 643395341. The next prime is 643395373. The reversal of 643395348 is 843593346.

643395348 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (36).

It is a super-2 number, since 2×643395348² = 827915147656082208, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (643395341) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 343 + ... + 35873.

It is an arithmetic number, because the mean of its divisors is an integer number (45267768).

Almost surely, 2^643395348 is an apocalyptic number.

It is an amenable number.

643395348 is an abundant number, since it is smaller than the sum of its proper divisors (986244300).

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

643395348 is a wasteful number, since it uses less digits than its factorization.

643395348 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36044 (or 36039 counting only the distinct ones).

The product of its digits is 933120, while the sum is 45.

The square root of 643395348 is about 25365.2389698974. The cubic root of 643395348 is about 863.2951588228.

The spelling of 643395348 in words is "six hundred forty-three million, three hundred ninety-five thousand, three hundred forty-eight".