38910806784 has 144 divisors (see below), whose sum is σ = 120069465600. Its totient is φ = 12406293504.

The previous prime is 38910806731. The next prime is 38910806801. The reversal of 38910806784 is 48760801983.

It is a tau number, because it is divible by the number of its divisors (144).

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a self number, because there is not a number n which added to its sum of digits gives 38910806784.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 36597 + ... + 281355.

Almost surely, 2^38910806784 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 38910806784, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (60034732800).

38910806784 is an abundant number, since it is smaller than the sum of its proper divisors (81158658816).

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

38910806784 is a wasteful number, since it uses less digits than its factorization.

38910806784 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 244807 (or 244787 counting only the distinct ones).

The product of its (nonzero) digits is 2322432, while the sum is 54.

The spelling of 38910806784 in words is "thirty-eight billion, nine hundred ten million, eight hundred six thousand, seven hundred eighty-four".