6312640240 has 20 divisors (see below), whose sum is σ = 14676888744. Its totient is φ = 2525056064.

The previous prime is 6312640219. The next prime is 6312640253. The reversal of 6312640240 is 420462136.

It is a tau number, because it is divible by the number of its divisors (20).

It is a junction number, because it is equal to n+sod(n) for n = 6312640199 and 6312640208.

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 3 ways as a sum of consecutive naturals, for example, 39453922 + ... + 39454081.

Almost surely, 2^6312640240 is an apocalyptic number.

It is an amenable number.

6312640240 is an abundant number, since it is smaller than the sum of its proper divisors (8364248504).

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

6312640240 is a wasteful number, since it uses less digits than its factorization.

6312640240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78908016 (or 78908010 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 28.

The square root of 6312640240 is about 79452.1254592978. The cubic root of 6312640240 is about 1848.1491340325.

The spelling of 6312640240 in words is "six billion, three hundred twelve million, six hundred forty thousand, two hundred forty".