638600812 has 6 divisors (see below), whose sum is σ = 1117551428. Its totient is φ = 319300404.

The previous prime is 638600803. The next prime is 638600813. The reversal of 638600812 is 218006836.

It is not an unprimeable number, because it can be changed into a prime (638600813) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 79825098 + ... + 79825105.

Almost surely, 2^638600812 is an apocalyptic number.

It is an amenable number.

638600812 is a deficient number, since it is larger than the sum of its proper divisors (478950616).

638600812 is a wasteful number, since it uses less digits than its factorization.

638600812 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 159650207 (or 159650205 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 34.

The square root of 638600812 is about 25270.5522693906. The cubic root of 638600812 is about 861.1454054700.

The spelling of 638600812 in words is "six hundred thirty-eight million, six hundred thousand, eight hundred twelve".