640560124 has 24 divisors (see below), whose sum is σ = 1136844800. Its totient is φ = 315759600.

The previous prime is 640560113. The next prime is 640560131. The reversal of 640560124 is 421065046.

It is a junction number, because it is equal to n+sod(n) for n = 640560092 and 640560101.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 327349 + ... + 329299.

Almost surely, 2^640560124 is an apocalyptic number.

It is an amenable number.

640560124 is a deficient number, since it is larger than the sum of its proper divisors (496284676).

640560124 is a wasteful number, since it uses less digits than its factorization.

640560124 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3073 (or 3071 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 28.

The square root of 640560124 is about 25309.2892827910. The cubic root of 640560124 is about 862.0252090754.

The spelling of 640560124 in words is "six hundred forty million, five hundred sixty thousand, one hundred twenty-four".