640124204 has 12 divisors (see below), whose sum is σ = 1125527928. Its totient is φ = 318544800.

The previous prime is 640124159. The next prime is 640124207. The reversal of 640124204 is 402421046.

It is a self number, because there is not a number n which added to its sum of digits gives 640124204.

It is not an unprimeable number, because it can be changed into a prime (640124207) 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, 378377 + ... + 380064.

It is an arithmetic number, because the mean of its divisors is an integer number (93793994).

Almost surely, 2^640124204 is an apocalyptic number.

It is an amenable number.

640124204 is a deficient number, since it is larger than the sum of its proper divisors (485403724).

640124204 is a wasteful number, since it uses less digits than its factorization.

640124204 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 758656 (or 758654 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 23.

The square root of 640124204 is about 25300.6759593494. The cubic root of 640124204 is about 861.8296201998.

The spelling of 640124204 in words is "six hundred forty million, one hundred twenty-four thousand, two hundred four".