638316424 has 32 divisors (see below), whose sum is σ = 1277939520. Its totient is φ = 298178496.

The previous prime is 638316421. The next prime is 638316431. The reversal of 638316424 is 424613836.

638316424 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (638316421) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 32427 + ... + 48250.

It is an arithmetic number, because the mean of its divisors is an integer number (39935610).

Almost surely, 2^638316424 is an apocalyptic number.

It is an amenable number.

638316424 is an abundant number, since it is smaller than the sum of its proper divisors (639623096).

638316424 is a wasteful number, since it uses less digits than its factorization.

638316424 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80749 (or 80745 counting only the distinct ones).

The product of its digits is 82944, while the sum is 37.

The square root of 638316424 is about 25264.9247772480. The cubic root of 638316424 is about 861.0175552399.

The spelling of 638316424 in words is "six hundred thirty-eight million, three hundred sixteen thousand, four hundred twenty-four".