638005000984 has 16 divisors (see below), whose sum is σ = 1288279329120. Its totient is φ = 294463846560.

The previous prime is 638005000957. The next prime is 638005000991. The reversal of 638005000984 is 489000500836.

It is a self number, because there is not a number n which added to its sum of digits gives 638005000984.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3067331632 + ... + 3067331839.

It is an arithmetic number, because the mean of its divisors is an integer number (80517458070).

Almost surely, 2^638005000984 is an apocalyptic number.

It is an amenable number.

638005000984 is an abundant number, since it is smaller than the sum of its proper divisors (650274328136).

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

638005000984 is a wasteful number, since it uses less digits than its factorization.

638005000984 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6134663490 (or 6134663486 counting only the distinct ones).

The product of its (nonzero) digits is 207360, while the sum is 43.

The spelling of 638005000984 in words is "six hundred thirty-eight billion, five million, nine hundred eighty-four", and thus it is an aban number.