643332932 has 48 divisors (see below), whose sum is σ = 1314835200. Its totient is φ = 272316960.

The previous prime is 643332889. The next prime is 643332941. The reversal of 643332932 is 239233346.

It is a super-2 number, since 2×643332932² = 827754522791433248, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 643332892 and 643332901.

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, 42803 + ... + 55845.

It is an arithmetic number, because the mean of its divisors is an integer number (27392400).

Almost surely, 2^643332932 is an apocalyptic number.

It is an amenable number.

643332932 is an abundant number, since it is smaller than the sum of its proper divisors (671502268).

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

643332932 is a wasteful number, since it uses less digits than its factorization.

643332932 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13136 (or 13134 counting only the distinct ones).

The product of its digits is 69984, while the sum is 35.

The square root of 643332932 is about 25364.0085948574. The cubic root of 643332932 is about 863.2672417351.

The spelling of 643332932 in words is "six hundred forty-three million, three hundred thirty-two thousand, nine hundred thirty-two".