640132332 has 48 divisors (see below), whose sum is σ = 1717927680. Its totient is φ = 181726272.

The previous prime is 640132291. The next prime is 640132349. The reversal of 640132332 is 233231046.

640132332 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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, 11082 + ... + 37457.

It is an arithmetic number, because the mean of its divisors is an integer number (35790160).

Almost surely, 2^640132332 is an apocalyptic number.

It is an amenable number.

640132332 is an abundant number, since it is smaller than the sum of its proper divisors (1077795348).

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

640132332 is a wasteful number, since it uses less digits than its factorization.

640132332 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48710 (or 48708 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 24.

The square root of 640132332 is about 25300.8365869589. The cubic root of 640132332 is about 861.8332678885.

Adding to 640132332 its reverse (233231046), we get a palindrome (873363378).

The spelling of 640132332 in words is "six hundred forty million, one hundred thirty-two thousand, three hundred thirty-two".