640583884 has 12 divisors (see below), whose sum is σ = 1121350608. Its totient is φ = 320198000.

The previous prime is 640583873. The next prime is 640583887. The reversal of 640583884 is 488385046.

It is not an unprimeable number, because it can be changed into a prime (640583887) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6832 + ... + 36439.

It is an arithmetic number, because the mean of its divisors is an integer number (93445884).

Almost surely, 2^640583884 is an apocalyptic number.

It is an amenable number.

640583884 is a deficient number, since it is larger than the sum of its proper divisors (480766724).

640583884 is a wasteful number, since it uses less digits than its factorization.

640583884 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46976 (or 46974 counting only the distinct ones).

The product of its (nonzero) digits is 737280, while the sum is 46.

The square root of 640583884 is about 25309.7586713110. The cubic root of 640583884 is about 862.0358671775.

The spelling of 640583884 in words is "six hundred forty million, five hundred eighty-three thousand, eight hundred eighty-four".