6488240638 has 32 divisors (see below), whose sum is σ = 11280215520. Its totient is φ = 2766197760.

The previous prime is 6488240609. The next prime is 6488240639. The reversal of 6488240638 is 8360428846.

It is a junction number, because it is equal to n+sod(n) for n = 6488240591 and 6488240600.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6488240639) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 79978 + ... + 139186.

It is an arithmetic number, because the mean of its divisors is an integer number (352506735).

Almost surely, 2^6488240638 is an apocalyptic number.

6488240638 is a deficient number, since it is larger than the sum of its proper divisors (4791974882).

6488240638 is a wasteful number, since it uses less digits than its factorization.

6488240638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59532.

The product of its (nonzero) digits is 1769472, while the sum is 49.

The square root of 6488240638 is about 80549.6160015676. The cubic root of 6488240638 is about 1865.1294644270.

The spelling of 6488240638 in words is "six billion, four hundred eighty-eight million, two hundred forty thousand, six hundred thirty-eight".