642911332 has 12 divisors (see below), whose sum is σ = 1285822720. Its totient is φ = 275533416.

The previous prime is 642911323. The next prime is 642911407. The reversal of 642911332 is 233119246.

642911332 is an admirable number.

It is a junction number, because it is equal to n+sod(n) for n = 642911294 and 642911303.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11480532 + ... + 11480587.

Almost surely, 2^642911332 is an apocalyptic number.

It is an amenable number.

642911332 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.

642911332 is a wasteful number, since it uses less digits than its factorization.

642911332 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22961130 (or 22961128 counting only the distinct ones).

The product of its digits is 7776, while the sum is 31.

The square root of 642911332 is about 25355.6962436451. The cubic root of 642911332 is about 863.0786234816.

The spelling of 642911332 in words is "six hundred forty-two million, nine hundred eleven thousand, three hundred thirty-two".